CK1a binds to Axin and phosphorylates beta-catenin at Ser45 priming GSK3 mediated phosphorylation at the more N-terminal residues (Amit et al., 2002; Liu et al., 2002; Yanagawa et al., 2002).
Amit, S, Hatzubai, A, Birman, Y, Andersen, JS, Ben-Shushan, E, Mann, M, Ben-Neriah, Y, Alkalay, I
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