S-antigen antibody partially blocks entrainment and the effects of constant light on the circadian rhythm of locomotor activity in the adult blow fly, Calliphora vicina.
Injection of S-antigen (arrestin) antibody into the brain of the blow fly, Calliphora vicina, appeared to reduce sensitivity to the photic effects of a light:dark cycle (LD; entrainment) or continuous "bright" light (LL; arrhythmicity). In LD, a proportion of the injected flies evaded entrainment or showed delayed entrainment. In bright LL, flies continued with a free-running rhythm, which remained unchanged (as in continuous darkness) or lengthened (as in "dim" LL). These results focus attention on four groups of arrestin-positive neurons in the fly's brain as potential components of the photoreceptive system.
Cymborowski
B
B
Department of Invertebrate Physiology, Warsaw University, Poland.
Hong
S F
SF
McWatters
H G
HG
Saunders
D S
DS
D000818:Animals; D000906:Antibodies / Q000276:immunology*; D000941:Antigens / Q000276:immunology*; D019393:Arrestin; D002940:Circadian Rhythm / Q000502:physiology*; D004175:Diptera / Q000502:physiology*; D005136:Eye Proteins / Q000276:immunology*; D005260:Female; D009043:Motor Activity / Q000502:physiology*; D010775:Photic Stimulation; D017440:Photoperiod; D017956:Photoreceptor Cells, Invertebrate / Q000502:physiology
D000906:Antibodies; D000941:Antigens; D019393:Arrestin; D005136:Eye Proteins