Additional file 1: of Hydra vulgaris exhibits day-night variation in behavior and gene expression levels

List of HyDCGs lists 380 diel cycle genes in Hydra vulgaris. “Gene ID” refers to the gene number registered in the Hydra 2.0 Genome Portal ( https://research.nhgri.nih.gov/hydra/ ). The homologue descriptions and gene ontology terms are based on information in the Hydra 2.0 Genome Portal. “Cluster” represents a group of IDs determined by K-means clustering (see Fig. 4). The subsequent columns refer to the significance levels obtained from the three algorithms for rhythmicity detection (ARSER, JTK_CYCLE and empirical JTK_CYCLE) and the normalized expression levels at six time points (two biological replicates). The expression level of each gene was normalized so that the mean intensity and the standard deviation were 0.0 and 1.0, respectively. (XLS 316 kb)