Fig. 3
From: Hydra vulgaris exhibits day-night variation in behavior and gene expression levels
Diel cycle genes in hydras a Experimental design for microarray analysis. Hydras were collected every 4 h under LD 12:12 cycles. b Detection of diel cycle genes by three algorithms. P values were used for the ARSER and JTK_CYCLE algorithms as cutoff thresholds, while Bonferroni-adjusted P values were used for the empirical JTK_CYCLE algorithm. The 380 genes identified by all three algorithms were defined as HyDCGs. c Phase-sorted heat map of HyDCGs. The data for each gene were normalized so that the mean signal intensity for 12 time points and the standard deviation were 0.0 and 1.0, respectively. d Distribution of HyDCGs across phases for a single cosine model (ARSER)