. . . "MASS SPECTROMETRY" . "PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT SER-105; THR-302; SER-523; THR-543; THR-548; SER-552; SER-566; SER-580; SER-625; SER-784; SER-831; THR-855; SER-892; SER-1068; SER-1104; THR-1171; THR-1214; SER-1216; SER-1219 AND SER-1290" . . . .