PASa, PASb and PAC domains region of putative L. polyphemus PERIOD (PER) protein. Alignment of L. polyphemus (Lim) PER to Daphnia pulex (Daph) PER, D. melanogaster(Dros) PER, Ixodes scapularis (Ix) PER using CLUSTAL Omega. Symbols immediately below sequence indicates functional similarity of residues between protein orthologs. “*” Indicates identical residues, “:” Indicates residues with strongly similar properties, “.” Indicates residues with weakly similar properties. Light green shows PAS domain, Red shows PAC domain. For full alignment see Supplemental Figure 1.