Fig. 1

Schematic representation of the Chinese perch clock gene structure: (a) Clock; (b) Cry; (c) Per1; (d) Nr1d2. The predicted domain structure of clock, cry1, per1 and nr1d2 are shown as above and presented below the sequence structure. The split domain of clock proteins is shown in different colors. Both clock and per1 proteins have a PAS domain. cry1 includes a photosensitive domain of DNA photolyase, and nr1d2 has a unique zinc finger structure that connects with the nuclear DNA