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. 2016 Dec 1;30(23):2596–2606. doi: 10.1101/gad.288258.116

Figure 4.

Figure 4.

IPC electrophysiological rhythms are not maintained in DD. (A) Relative proportions of firing phenotypes from IPCs at different windows of the circadian day when entrained to a light cycle (ZT 0–4 and ZT 8–12) (data replotted from Fig. 1) compared with flies maintained in DD for 18–22 h prior to recording. CT 0–4, n = 7; CT 8–12, n = 9. (B) Event frequency was not different between ZT 0–4 and CT 0–4; however, we observed significantly higher event frequency at CT 8–12 compared with ZT 8–12. (C) Resting membrane potential was constant across all conditions. (D) Mean half-width of tonic action potentials was nearly identical between ZT 0–4 and CT 0–4 and also between ZT 8–12 and CT 8–12. Although the trend toward longer action potentials was maintained at CT 8–12, the half-width difference was not significant between CT 8–12 and morning time points. (E,F) Mean action potential amplitude (E) and mean burst duration (F) were similar across all conditions.