Fig. 1. Expression and intracellular localization of conventional and novel PKC isozymes in REF cells. (A) PKC isoforms expressed in REF cells. REF cell lysates were resolved by SDS-PAGE and probed with monoclonal antibodies against the PKC isoforms indicated. +ve, positive control; REF, REF cell lysate. (B) Differential localization of endogenous PKCs
,
and
with respect to the actin cytoskeleton. PKC
is localized at the ends of stress fibres (focal adhesions) and in a juxtanuclear pool, whereas PKC
is mostly cytoplasmic with some staining associated with cortical actin (arrows). PKC
is perinuclear and shows a Golgi-like staining. Bar, 50 µm.