a phosphopeptide which contains 14 residues including phosphoserine and which is derived from the nh2-terminal region of skeletal muscle glycogen phosphorylase ( nolan , c. , novoa , w. b. , krebs , e. g. , and fischer , e. h. ( 1964 ) biochemistry 3 , 542-551 ) has been shown to induce the enzymic properties of phosphorylase a in phosphorylase b and b ' .
C0017916
phosphorylase
C0031711
phosphorylase b