ckl4 cDNA ORF clone, Arabidopsis thaliana(thale cress)

Sequence and analysis of chromosome 4 of the plant Arabidopsis thaliana.
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Nature402(6763)769-77(1999 Dec)

Studies show that CK1.3 (At4g28880) and CK1.4 (At4g28860) directly phosphorylate CRY2 at Ser-587 and Thr-603 in vitro and negatively regulate CRY2 stability, which are stimulated by blue light.
Title: Arabidopsis casein kinase1 proteins CK1.3 and CK1.4 phosphorylate cryptochrome2 to regulate blue light signaling.