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| Term | photoreceptor cell R2 | ID (Ontology) | FBbt:00004215 (Fly Anatomy) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Definition | Outer photoreceptor cell of the adult eye whose rhabdomere is located in the middle of the longer of the two parallel sides of the trapezoid of rhabdomeres in each ommatidium. It has a single axon that projects along a single lamina optic cartridge (Fischbach and Dittrich, 1989; Wolff and Ready, 1993).[ FlyBase:FBrf0049410 FlyBase:FBrf0064798 FlyBase:FBrf0216925 ] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Also Known As | "lamina receptor cell R2" ; "R2" | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Comment | The name photoreceptor cell R2 is occasionally, mistakenly assumed to refer to any Rh2 expressing photoreceptor cell. This is incorrect. This term only refers to a type of adult eye photoreceptor cell. The name is based simply on the position of the cell and its rhabdomere within each ommatidium - see figure 4 in Wolff and Ready, 1993. Cell connectivity was determined by analysis of semi-automated EM reconstruction of 749 serial sections of 21 complete lamina cartridges. The number of synaptic connections for R2 (presynaptic/postsynaptic) in a single lamina cartridge with each cell type was the following: L1 (43/-), L2 (45/1), L3 (10/-), L4 (-/1), Lai (39/-), T1 (2/-), Lawf (-/3), epithelial glia (13/-) and surface glia (1/-) (Rivera-Alba et al., 2011). | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Links to External Ontologies | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| VFB:FBbt_00004215 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Annotations | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Records annotated with this term OR any of its CHILD TERMS | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records
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eye photoreceptor cell |__outer photoreceptor cell |__photoreceptor cell R2 246 rec. |
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Relationships
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| Is a | outer photoreceptor cell | ||
| Develops from | photoreceptor R2 precursor cell | ||
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Synonyms & Secondary IDs
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External Crossreferences & Linkouts
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CL:0000690 VFB:FBbt_00004215 |
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