FB2026_02 , released June 18, 2026
Gene: Dmel\sw
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General Information
Symbol
Dmel\sw
Species
D. melanogaster
Name
short wing
Annotation Symbol
CG18000
Feature Type
FlyBase ID
FBgn0003654
Gene Model Status
Stock Availability
Gene Summary
short wing (sw) encodes the non-catalytic intermediate chain subunit of the cytoplasmic dynein motor complex. It contributes to wing development, eye development, oocyte development and polarity, mitotic cell division, and neuronal transport and neurogenesis. [Date last reviewed: 2019-03-14] (FlyBase Gene Snapshot)
Also Known As

Cdic, Dic, IC, dynein intermediate chain, 17-234

Key Links
Genomic Location
Cytogenetic map
Sequence location
Recombination map
1-64
RefSeq locus
NC_004354 REGION:20227961..20236382
Sequence
Genomic Maps
Other Genome Views
The following external sites may use different assemblies or annotations than FlyBase.
Function
Gene Ontology (GO) Annotations (15 terms)
Molecular Function (3 terms)
Terms Based on Experimental Evidence (2 terms)
CV Term
Evidence
References
inferred from physical interaction with FLYBASE:DCTN1-p150; FB:FBgn0001108
inferred from physical interaction with FLYBASE:ctp; FB:FBgn0011760
inferred from physical interaction with FLYBASE:Dlc90F; FB:FBgn0024432
Terms Based on Predictions or Assertions (2 terms)
CV Term
Evidence
References
inferred from biological aspect of ancestor with PANTHER:PTN000277823
inferred from sequence or structural similarity with UniProtKB:P54703
inferred from biological aspect of ancestor with PANTHER:PTN000277823
Biological Process (10 terms)
Terms Based on Experimental Evidence (9 terms)
CV Term
Evidence
References
inferred from mutant phenotype
involved_in cellularization
inferred from genetic interaction with FLYBASE:dop; FB:FBgn0267390
inferred from mutant phenotype
inferred from mutant phenotype
inferred from direct assay
inferred from mutant phenotype
inferred from mutant phenotype
inferred from mutant phenotype
Terms Based on Predictions or Assertions (2 terms)
CV Term
Evidence
References
inferred from electronic annotation with InterPro:IPR025956
inferred from biological aspect of ancestor with PANTHER:PTN000277824
Cellular Component (2 terms)
Terms Based on Experimental Evidence (2 terms)
CV Term
Evidence
References
Terms Based on Predictions or Assertions (1 term)
CV Term
Evidence
References
inferred from electronic annotation with InterPro:IPR025956
inferred from biological aspect of ancestor with PANTHER:PTN000277824
Protein Family (UniProt)
Belongs to the dynein intermediate chain family. (Q24246)
Summaries
Gene Snapshot
short wing (sw) encodes the non-catalytic intermediate chain subunit of the cytoplasmic dynein motor complex. It contributes to wing development, eye development, oocyte development and polarity, mitotic cell division, and neuronal transport and neurogenesis. [Date last reviewed: 2019-03-14]
Gene Group (FlyBase)
CYTOPLASMIC DYNEIN INTERMEDIATE CHAINS -
Dyneins are minus end-directed microtubule motor protein complexes. Cytoplasmic dynein intermediate chains are subunits of dynein complexes. They interact with dynein cargo and link cytoplasmic dynein to dynactin. (Adapted from FBrf0214141 and PMID:24064538).
Protein Function (UniProtKB)
Acts as one of several non-catalytic accessory components of the cytoplasmic dynein 1 complex that are thought to be involved in linking dynein to cargos and to adapter proteins that regulate dynein function. Cytoplasmic dynein 1 acts as a motor for the intracellular retrograde motility of vesicles and organelles along microtubules. The intermediate chains mediate the help dynein bind to dynactin 150 kDa component (By similarity).
(UniProt, Q24246)
Phenotypic Description (Red Book; Lindsley and Zimm 1992)
sw: short wing
thumb
sw: short wing
From Eker, 1935, J. Genet. 30: 357-68.
Above 23, most sw1 flies have spread and incised wings with irregular veins; eyes reduced and roughened. Male expression more extreme than female. 15% of males eclose at 25; show wing and eye abnormalities (Schalet, 1969, DIS 43: 128); above 31, sw is lethal. At 17, most flies are wild type; at 14, all are wild type. +/Df(1)mal10 and +/sw exhibit short-wing phenotype in presence of RpII215Ubl (Mortin and Lefevre, 1981, Chromosoma 82: 237-47). RK2 at 28.
Gene Model and Products
Number of Transcripts
15
Number of Unique Polypeptides
12

Please see the JBrowse view of Dmel\sw for information on other features

To submit a correction to a gene model please use the Contact FlyBase form

Protein Domains (via Pfam)
Isoform displayed:
Pfam protein domains
InterPro name
classification
start
end
Protein Domains (via SMART)
Isoform displayed:
SMART protein domains
InterPro name
classification
start
end
Structure
Protein 3D structure   (Predicted by AlphaFold)   (AlphaFold entry Q24246)

If you don't see a structure in the viewer, refresh your browser.
Model Confidence:
  • Very high (pLDDT > 90)
  • Confident (90 > pLDDT > 70)
  • Low (70 > pLDDT > 50)
  • Very low (pLDDT < 50)

AlphaFold produces a per-residue confidence score (pLDDT) between 0 and 100. Some regions with low pLDDT may be unstructured in isolation.

Experimentally Determined Structures
Crossreferences
PDB - An information portal to biological macromolecular structures
Comments on Gene Model

Annotated transcripts do not represent all possible combinations of alternative exons and/or alternative promoters.

Low-frequency RNA-Seq exon junction(s) not annotated.

Gene model reviewed during 5.50

Transcript Data
Annotated Transcripts
Name
FlyBase ID
RefSeq ID
Length (nt)
Assoc. CDS (aa)
FBtr0089397
2699
634
FBtr0089398
2841
627
FBtr0089399
2838
626
FBtr0089400
2889
643
FBtr0089401
3070
642
FBtr0089402
2910
650
FBtr0089403
2868
636
FBtr0089404
2702
635
FBtr0089405
2678
627
FBtr0089406
2786
663
FBtr0089407
2756
653
FBtr0089408
3032
643
FBtr0089409
2873
643
FBtr0340360
2862
634
FBtr0340361
2889
643
Additional Transcript Data and Comments
Reported size (kB)

2.8 (northern blot)

Comments
External Data
Crossreferences
Polypeptide Data
Annotated Polypeptides
Name
FlyBase ID
Predicted MW (kDa)
Length (aa)
Theoretical pI
UniProt
RefSeq ID
GenBank
FBpp0088419
70.2
634
5.03
FBpp0088420
69.5
627
5.09
FBpp0088421
69.4
626
5.09
FBpp0088422
71.5
643
4.82
FBpp0088423
71.4
642
4.82
FBpp0088424
72.2
650
4.78
FBpp0088425
70.6
636
4.81
FBpp0088426
70.6
635
4.81
FBpp0088427
69.4
627
5.03
FBpp0088428
73.9
663
4.91
FBpp0088429
72.9
653
4.87
FBpp0089020
71.5
643
4.82
FBpp0089021
71.5
643
4.82
FBpp0309318
70.2
634
5.03
FBpp0309319
71.4
643
4.78
Polypeptides with Identical Sequences

The group(s) of polypeptides indicated below share identical sequence to each other.

634 aa isoforms: sw-PA, sw-PN
643 aa isoforms: sw-PD, sw-PL, sw-PM
Additional Polypeptide Data and Comments
Reported size (kDa)

653, 650, 643, 642, 636, 635, 634, 627, 626, 163 (aa)

Comments
External Data
Subunit Structure (UniProtKB)

Homodimer. The cytoplasmic dynein 1 complex consists of two catalytic heavy chains (HCs) and a number of non-catalytic subunits presented by intermediate chains (ICs), light intermediate chains (LICs) and light chains (LCs).

(UniProt, Q24246)
Crossreferences
Linkouts
Sequences Consistent with the Gene Model
Nucleotide / Polypeptide Records
 
Mapped Features

Click to get a list of regulatory features (enhancers, TFBS, etc.) and gene disruptions (point mutations, indels, etc.) within or overlapping Dmel\sw using the Feature Mapper tool.

External Data
Crossreferences
Linkouts
Expression Data
Testis-specificity index

The testis specificity index was calculated from modENCODE tissue expression data by Vedelek et al., 2018 to indicate the degree of testis enrichment compared to other tissues. Scores range from -2.52 (underrepresented) to 5.2 (very high testis bias).

-0.20

Transcript Expression
in situ
Stage
Tissue/Position (including subcellular localization)
Reference
organism

Comment: maternally deposited

northern blot
Stage
Tissue/Position (including subcellular localization)
Reference
Additional Descriptive Data

"Cdic1a" is one of the major forms of sw mRNA expressed in the fly. It is constitutively expressed and together with "Cdic2a" and "Cdic2b" makes up over 70% if the sw mRNA in adults, embryos and all tested body parts.

"Cdic5a" is a minor form of sw mRNA which is up-regulated in the head and to a lesser extent in the torso.

"Cdic5b" is a minor form of sw mRNA which is up-regulated in the head and to a lesser extent in the torso.

"Cdic1b" is a minor form of sw mRNA which is up-regulated in the ovary.

"Cdic1c" is a minor form of sw mRNA which is up-regulated in the ovary.

"Cdic2a" is one of the major forms of sw mRNA expressed in the fly. It is constitutively expressed and together with "Cdic1a" and "Cdic2b" makes up over 70% if the sw mRNA in adults, embryos and all tested body parts.

"Cdic2b" is one of the major forms of sw mRNA expressed in the fly. It is constitutively expressed and together with "Cdic1a" and "Cdic2a" makes up over 70% if the sw mRNA in adults, embryos and all tested body parts.

"Cdic2c" is a minor form of sw mRNA which is constitutively expressed at a low level.

"Cdic3a" is a minor form of sw mRNA which is up-regulated in the ovary.

"Cdic3b" is a minor form of sw mRNA which is up-regulated in the ovary.

"Cdic4" is a minor form of sw mRNA which is up-regulated in the ovary.

Marker for
 
Subcellular Localization
CV Term
Polypeptide Expression
mass spectroscopy
Stage
Tissue/Position (including subcellular localization)
Reference
Additional Descriptive Data
Marker for
 
Subcellular Localization
CV Term
Evidence
References
Expression Deduced from Reporters
High-Throughput Expression Data
Associated Tools

JBrowse - Visual display of RNA-Seq signals

View Dmel\sw in JBrowse
RNA-Seq by Region - Search RNA-Seq expression levels by exon or genomic region
Reference
See Gelbart and Emmert, 2013 for analysis details and data files for all genes.
Developmental Proteome: Life Cycle
Developmental Proteome: Embryogenesis
External Data and Images
Linkouts
BDGP expression data - Patterns of gene expression in Drosophila embryogenesis
DRscDB - A single-cell RNA-seq resource for data mining and data comparison across species
EMBL-EBI Single Cell Expression Atlas - Single cell expression across species
FlyAtlas - Adult expression by tissue, using Affymetrix Dros2 array
FlyAtlas2 - A Drosophila melanogaster expression atlas with RNA-Seq, miRNA-Seq and sex-specific data
Fly-FISH - A database of Drosophila embryo and larvae mRNA localization patterns
Flygut - An atlas of the Drosophila adult midgut
Images
Alleles, Insertions, Transgenic Constructs, and Aberrations
Classical and Insertion Alleles ( 31 )
For All Classical and Insertion Alleles Show
 
Other relevant insertions
Transgenic Constructs ( 5 )
For All Alleles Carried on Transgenic Constructs Show
Transgenic constructs containing/affecting coding region of sw
Transgenic constructs containing regulatory region of sw
Aberrations (Deficiencies and Duplications) ( 73 )
Inferred from experimentation ( 73 )
Gene not disrupted in
Inferred from location ( 11 )
Variants
Variant Molecular Consequences
Alleles Representing Disease-Implicated Variants
Phenotypes
For more details about a specific phenotype click on the relevant allele symbol.
Lethality
Allele
lethal (with sw2)
lethal (with sw5)
lethal (with sw6)
lethal (with sw7)
Sterility
Allele
Other Phenotypes
Allele
Phenotype manifest in
Allele
nucleus & spermatid
Orthologs
Human Orthologs (via DIOPT v9.1)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
Homo sapiens (Human) (22)
13 of 14
Yes
Yes
2  
13 of 14
Yes
Yes
2  
3 of 14
No
Yes
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1  
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1  
1 of 14
No
No
2  
1 of 14
No
No
4  
1 of 14
No
No
1 of 14
No
No
1  
1 of 14
No
No
1 of 14
No
No
1  
1 of 14
No
No
1 of 14
No
No
Model Organism Orthologs (via DIOPT v9.1)
Species\Gene Symbol
Score
Best Score
Best Reverse Score
Alignment
Complementation?
Transgene?
Rattus norvegicus (Norway rat) (13)
14 of 14
Yes
Yes
13 of 14
No
Yes
3 of 14
No
Yes
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
Mus musculus (laboratory mouse) (14)
14 of 14
Yes
Yes
13 of 14
No
Yes
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
No
2 of 14
No
Yes
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
Xenopus tropicalis (Western clawed frog) (19)
7 of 13
Yes
Yes
6 of 13
No
No
2 of 13
No
No
2 of 13
No
Yes
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
Yes
Danio rerio (Zebrafish) (19)
12 of 14
Yes
Yes
12 of 14
Yes
Yes
12 of 14
Yes
Yes
3 of 14
No
No
3 of 14
No
Yes
2 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
Yes
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
Caenorhabditis elegans (Nematode, roundworm) (11)
14 of 14
Yes
Yes
2 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
1 of 14
No
No
Anopheles gambiae (African malaria mosquito) (16)
11 of 12
Yes
Yes
Arabidopsis thaliana (thale-cress) (20)
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
Yes
Yes
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
Yes
No
1 of 13
Yes
No
Saccharomyces cerevisiae (Brewer's yeast) (5)
3 of 13
Yes
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
1 of 13
No
No
Schizosaccharomyces pombe (Fission yeast) (2)
10 of 12
Yes
Yes
1 of 12
No
No
Escherichia coli (enterobacterium) (0)
Other Organism Orthologs (via OrthoDB)
Data provided directly from OrthoDB:sw. Refer to their site for version information.
Paralogs
Paralogs (via DIOPT v9.1)
Drosophila melanogaster (Fruit fly) (27)
13 of 13
13 of 13
12 of 13
12 of 13
11 of 13
10 of 13
10 of 13
4 of 13
4 of 13
4 of 13
4 of 13
4 of 13
4 of 13
4 of 13
3 of 13
2 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
1 of 13
Human Disease Associations
FlyBase Human Disease Model Reports
    Disease Ontology (DO) Annotations
    Models Based on Experimental Evidence ( 0 )
    Allele
    Disease
    Evidence
    References
    Potential Models Based on Orthology ( 1 )
    Modifiers Based on Experimental Evidence ( 0 )
    Allele
    Disease
    Interaction
    References
    Disease Associations of Human Orthologs (via DIOPT v9.1 and OMIM)
    Note that ortholog calls supported by only 1 or 2 algorithms (DIOPT score < 3) are not shown.
    Functional Complementation Data
    Functional complementation data is computed by FlyBase using a combination of the orthology data obtained from DIOPT and OrthoDB and the allele-level genetic interaction data curated from the literature.
    Interactions
    Summary of Physical Interactions
    Interaction Browsers

    Please see the Physical Interaction reports below for full details
    protein-protein
    Physical Interaction
    Assay
    References
    RNA-protein
    Physical Interaction
    Assay
    References
    Summary of Genetic Interactions
    Interaction Browsers

    Please look at the allele data for full details of the genetic interactions
    Starting gene(s)
    Interaction type
    Interacting gene(s)
    Reference
    Starting gene(s)
    Interaction type
    Interacting gene(s)
    Reference
    External Data
    Subunit Structure (UniProtKB)
    Homodimer. The cytoplasmic dynein 1 complex consists of two catalytic heavy chains (HCs) and a number of non-catalytic subunits presented by intermediate chains (ICs), light intermediate chains (LICs) and light chains (LCs).
    (UniProt, Q24246 )
    Linkouts
    BioGRID - A database of protein and genetic interactions.
    DroID - A comprehensive database of gene and protein interactions.
    MIST (genetic) - An integrated Molecular Interaction Database
    MIST (protein-protein) - An integrated Molecular Interaction Database
    Pathways
    Signaling Pathways (FlyBase)
    Metabolic Pathways
    FlyBase
    External Links
    External Data
    Linkouts
    KEGG Pathways - A collection of manually drawn pathway maps representing knowledge of molecular interaction, reaction and relation networks.
    SignaLink - A signaling pathway resource with multi-layered regulatory networks.
    Class of Gene
    Genomic Location and Detailed Mapping Data
    Chromosome (arm)
    X
    Recombination map
    1-64
    Cytogenetic map
    Sequence location
    FlyBase Computed Cytological Location
    Cytogenetic map
    Evidence for location
    19C1-19C1
    Limits computationally determined from genome sequence between P{EP}amnEP1639&P{EP}amnEP367 and P{EP}CG1702EP1525
    Experimentally Determined Cytological Location
    Cytogenetic map
    Notes
    References
    19C-19C
    (determined by in situ hybridisation)
    19E-19E
    (determined by in situ hybridisation)
    19B-19B
    (determined by in situ hybridisation)
    Experimentally Determined Recombination Data
    Location
    Left of (cM)
    Right of (cM)
    Notes
    Stocks and Reagents
    Stocks (8)
    Genomic Clones (9)
     

    Please Note FlyBase no longer curates genomic clone accessions so this list may not be complete

    cDNA Clones (201)
     

    Please Note This section lists cDNAs and ESTs that fall within the genomic extent of the gene model, which may include cDNAs and ESTs of genes within introns, or of overlapping genes. Please see JBrowse for alignment of the cDNAs and ESTs to the gene model.

    cDNA clones, fully sequenced
    Other clones
      Drosophila Genomics Resource Center cDNA clones

      For each fully sequenced cDNA the DGRC maintains various forms of the cDNA (e.g tagged or untagged) in several different host vectors for subsequent cloning and expression in Drosophila and Drosophila cell lines.

      cDNA Clones, End Sequenced (ESTs)
      Other clones
      RNAi and Array Information
      Linkouts
      DRSC - Results frm RNAi screens
      Antibody Information
      Laboratory Generated Antibodies
       
      Commercially Available Antibodies
       
      Cell Line Information
      Publicly Available Cell Lines
       
        Other Stable Cell Lines
         
          Other Comments

          sw is required for polarised dendritic transport and uniform microtubule orientation in axons.

          Relationship to Other Genes
          Source for database merge of

          Source for merge of: Cdic CG18000

          Source for merge of: sw Cdic

          Additional comments

          The genes sw and Sdic1 share >70% identity and close proximity, and so may have been derived from a DNA-based tandem duplication.

          The proximity of "Su(Gl)27" to "sw", together with the nature of the Gl product suggests that "Su(Gl)27" and "sw" may be the same gene.

          Either this is a complex locus with sw4 being the only noncomplementing allele or sw4 is a double mutant and there are two loci. Numerous lethal alleles at this locus recovered from line containing a P element in 19C (Simmons, Raymond, Johnson, and Fahey, 1984).

          Nomenclature History
          Source for database identify of
          Nomenclature comments
          Etymology
          Synonyms and Secondary IDs (31)
          Reported As
          Symbol Synonym
          l(1)19Bb
          Secondary FlyBase IDs
          • FBgn0013761
          • FBgn0031096
          Datasets (0)
          Study focus (0)
          Experimental Role
          Project
          Project Type
          Title
          Study result (0)
          Result
          Result Type
          Title
          External Crossreferences and Linkouts ( 123 )
          Sequence Crossreferences
          NCBI Gene - Gene integrates information from a wide range of species. A record may include nomenclature, Reference Sequences (RefSeqs), maps, pathways, variations, phenotypes, and links to genome-, phenotype-, and locus-specific resources worldwide.
          GenBank Protein - A collection of sequences from several sources, including translations from annotated coding regions in GenBank, RefSeq and TPA, as well as records from SwissProt, PIR, PRF, and PDB.
          UniProt/GCRP - The gene-centric reference proteome (GCRP) provides a 1:1 mapping between genes and UniProt accessions in which a single 'canonical' isoform represents the product(s) of each protein-coding gene.
          UniProt/Swiss-Prot - Manually annotated and reviewed records of protein sequence and functional information
          UniProt/TrEMBL - Automatically annotated and unreviewed records of protein sequence and functional information
          Other crossreferences
          AlphaFold DB - AlphaFold provides open access to protein structure predictions for the human proteome and other key proteins of interest, to accelerate scientific research.
          BDGP expression data - Patterns of gene expression in Drosophila embryogenesis
          DRscDB - A single-cell RNA-seq resource for data mining and data comparison across species
          EMBL-EBI Single Cell Expression Atlas - Single cell expression across species
          FlyAtlas2 - A Drosophila melanogaster expression atlas with RNA-Seq, miRNA-Seq and sex-specific data
          FlyMine - An integrated database for Drosophila genomics
          KEGG Genes - Molecular building blocks of life in the genomic space.
          MARRVEL_MODEL - MARRVEL (model organism gene)
          PDB - An information portal to biological macromolecular structures
          Linkouts
          BioGRID - A database of protein and genetic interactions.
          Drosophila Genomics Resource Center - Drosophila Genomics Resource Center (DGRC) cDNA clones
          DroID - A comprehensive database of gene and protein interactions.
          DRSC - Results frm RNAi screens
          FlyAtlas - Adult expression by tissue, using Affymetrix Dros2 array
          FlyCyc Genes - Genes from a BioCyc PGDB for Dmel
          Fly-FISH - A database of Drosophila embryo and larvae mRNA localization patterns
          Flygut - An atlas of the Drosophila adult midgut
          FlyMet - A comprehensive tissue-specific metabolomics resource for Drosophila.
          iBeetle-Base - RNAi phenotypes in the red flour beetle (Tribolium castaneum)
          KEGG Pathways - A collection of manually drawn pathway maps representing knowledge of molecular interaction, reaction and relation networks.
          MIST (genetic) - An integrated Molecular Interaction Database
          MIST (protein-protein) - An integrated Molecular Interaction Database
          SignaLink - A signaling pathway resource with multi-layered regulatory networks.
          References (179)