Role of the CLOCK Protein in the Mammalian Circadian Mechanism Gekakis, Nicholas ; Staknis, David ; Nguyen, Hubert B. ; Davis, Fred C. ; Wilsbacher, Lisa D. ; King, David P. ; Takahashi, Joseph S. ; Weitz, Charles J. Abstract Publication: Science Pub Date: June 1998 DOI: 10.1126/science.280.5369.1564 Bibcode: 1998Sci...280.1564G