Drosophila doubletime mutations which either shorten or lengthen the period of circadian rhythms decrease the protein kinase activity of casein kinase I.
Mol Cell Biol. 2004 Jan;24(2):886-98. doi: 10.1128/mcb.24.2.886-898.2004.
Mol Cell Biol. 2004.
PMID: 14701759
Free PMC article.