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.

CDK1 S126-p
PLK1 S126-p , S128-p , S133-p , S147-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 S126-p , S128-p
ERK2 S126-p , S128-p
PLK1 S126-p , S128-p , S133-p , S147-p
PLK3 S133-p
Regulatory protein:
MASTL S126-p
PPP2CA S126-p
Treatment:
ionizing_radiation S126-p
MG132_withdrawal S95-p
MS275 K73-ac
RO-3306 S126-p
vorinostat K73-ac