subsequent cleavage products included intermediate-sized 32p-phosphopeptides ( 43,000 and 37,000 ) , but all 32p label became increasingly associated with lower molecular weight material ( 13,000 and 9,000 ) eventually terminating in a phosphopeptide ( or peptides ) of mr approximately 6,000 .
C0031684
phosphopeptides
C0030956
peptides