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Darlington et al., 1998, Science 280(5369): 1599--1603 [FBrf0102836]

CYCLE is a second bHLH-PAS clock protein essential for circadian rhythmicity and transcription of Drosophila period and timeless.

Rutila et al., 1998, Cell 93(5): 805--814 [FBrf0102728]

A mutant Drosophila homolog of mammalian Clock disrupts circadian rhythms and transcription of period and timeless.

Allada et al., 1998, Cell 93(5): 791--804 [FBrf0102727]

Role of the CLOCK protein in the mammalian circadian mechanism.

Gekakis et al., 1998, Science 280(5369): 1564--1569 [FBrf0103503]