Q-K-R-P-S-Q-R-S-K-Y-L

This fragment of the bovine myelin basic protein (residues 4-14) has been described as the most specific substrate for the selective assay of protein kinase C. Its Km value of 7 µM is comparable with the values for H1 histone and intact myelin basic protein, but its velocity of phosphorylation is twice as fast.