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.

CDK5 S67-p
CDK5 S6-p , S67-p
PKCA S67-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.

CDK1 S67-p
CDK5 S67-p
ERK1 S67-p
Phosphatases, in vitro:
PPP2CA S67-p
PPP3CA S67-p
Putative upstream phosphatases:
PPP2CA S67-p
PPP3CA S67-p
ciclosporin S67-p
depolarization S6-p , S67-p
insulin S6-p
LY294002 S6-p
NMDA S6-p , S67-p
okadaic_acid S67-p
phorbol_ester S6-p , S67-p
Ro-32-0432 S67-p
seliciclib S67-p