the results showed that the four protein phosphatases defined in the preceding paper , namely protein phosphatases-1 , 2a , 2b and 2c [ ingebritsen , t. s. and cohen , p. ( 1983 ) eur . j. biochem . 132 , 255-261 ] were the only significant enzymes acting on these substrates .
C0031686
protein
C1956003
protein phosphatases-1