no detectable hydrolysis of sphingomyelin was observed , indicating ( 1 ) that phospholipases b , c and d and sphingomyelinases were not significantly activated , and ( 2 ) that the phospholipase a2 activated did not exhibit a high degree of specificity for arachidonic acid moieties in its substrates .
C0020291
hydrolysis
C0037903
sphingomyelinases