A homolog of CLOCK plays the same role in the human clock, and CYC is replaced by BMAL1. CRY has two human homologs, CRY1 and CRY2, which was discovered by Edmund A. Griffin, Jr., David Staknis and Charles J. Weitz to encompass light-independent interactions with CLOCK and BMAL1.
The gene that shares a similar role with CLOCK in the human body is referred to as its homologue, while CYC is replaced by BMAL1. CRY has two human counterparts, CRY1 and CRY2, which were discovered by Edmund A. Griffin, Jr., David Staknis, and Charles J. Weitz to enable interactions between CLOCK and BMAL1 that occur independently of light.