Kinase, in vitro: 

An enzyme-substrate reaction that occurs in non-living experimental conditions such as a test tube. For example, a purified enzyme is reacted with a substrate protein or mixture of proteins or peptides.

PKCA S148-p
 Putative in vivo kinases: 

An enzyme-substrate reaction that occurs within living cells; includes cultured cells, ex vivo samples, and intact organisms. In the case of kinases, the large number of protein kinases in intact cells makes exact identification of the responsible kinase challenging.

PKCA S145-p , S148-p
Putative upstream phosphatases:
PPP2CA S145-p
Regulatory protein:
ZAP70 Y160-p , Y171-p
anti-CD28 Y160-p , Y171-p
anti-CD3 Y160-p , Y171-p
phorbol_ester S148-p
phytohemagglutinin S148-p
U0126 Y160-p , Y171-p