FlyBase curator comment: this entry is used to capture phenotypic information when the particular allele (or allele combination) used by the author could not be determined but the context of the experiment suggests that the phenotype being described is some kind of loss of function.
Exn[+]/Exnunspecified, GluRIIASP16, cacHC129/cac[+] has abnormal neurophysiology | recessive | third instar larval stage phenotype
Exn[+]/Exnunspecified, GluRIIASP16, cacHC129/cac[+] has embryonic/larval neuromuscular junction phenotype
The recessive GluRIIASP16 single mutant NMJ synaptic homeostatic response is completely suppressed in the presence of a heterozygous cacHC129/+ mutation in combination with an Exnunspecified/+ heterozygous genetic background.