Table 1. Properties and relative protein expression of PKC isoforms in COS-7 cells.

PKC ISOFORMS	PMA dependent	Ca2+ dependent	Expressed in COS cells
Alpha	YES	YES	+++
Beta I	YES	YES	+
Beta II	YES	YES	+
Delta	YES	NO	+
Eta	YES	NO	−
Epsilon	YES	NO	+
Gamma	YES	YES	−
Iota	NO	NO	++
Lamda	NO	NO	++
Theta	YES	NO	+
Zeta	NO	NO	++++