TABLE 1.

Interfacial binding of cPLA₂α to vesicles

Enzyme	Vesicle composition	appKCa	Enzyme bound without Ca2+
		μm	%
cPLA2α-PAP	100% PAPC	0.7 ± 0.1	50
cPLA2α-505P	100% PAPC	0.9 ± 0.2	50
cPLA2α-515P	100% PAPC	0.5 ± 0.1	44
cPLA2α-PAP	90% PAPC, 10% PIP2	0.4 ± 0.1	37
cPLA2α-505P	90% PAPC, 10% PIP2	0.2 ± 0.02	48
cPLA2α-515P	90% PAPC, 10% PIP2	0.3 ± 0.05	33