TABLE 2.

Substrate specificity of the cloned purified enzyme

Substrate	Activitya
	μmol/mg/h
[14C]Sphingomyelin	45 ± 2.76b
[14C]Phosphatidylcholine	0.003 ± 0.0003b
[3H]Lyso-PAF	0.024 ± 0.0012c

^a Values are means ± S.D. (n = 3).

^b Activity was determined in the presence of 0.1% Triton X-100.

^c Activity was determined in the absence of Triton X-100.