Peptide sequence: RSRRSSPKRK RNRHCSSHQS RSKSHRRKRS RSIEDDEEGH LICQSGDVLR Sequence homology: Cow: 93%; Dog: 100%; Guinea Pig: 100%; Horse: 93%; Human: 100%; Mouse: 86%; Rabbit: 100%; Rat: 93%; Yeast: 91%. CLK4 belongs to the CDC2-like protein kinase (CLK)