Selective phosphopeptide substrate for glycogen synthase kinase-3 (GSK-3); derived from the phosphorylation site of the translation factor eIF2B.
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Peptide substrates suitable for assaying glycogen synthase kinase-3 in crude cell extracts.
Welsh et al.
Phosphorylated seryl and threonyl, but not tyrosyl, residues are efficient specificity determinants for GSK-3β and Shaggy.
Williams et al.
FEBS Lett., 1999;448:86