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 S221-p
ERK1 S221-p , S315-p
ERK2 S221-p , S315-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 S221-p
ERK1 S221-p , S315-p
ERK2 S221-p , S315-p
Regulatory protein:
PRP4 S221-p
Treatment:
anti-CD3 S221-p
BI2536 S270-p
EGF S221-p , S315-p
ischemia S221-p
nocodazole S221-p , T246-p , T259-p , S263-p , S296-p
phorbol_ester S221-p , S315-p
selumetinib S221-p
U0126 S221-p , S315-p
vemurafenib S221-p
vorinostat K83-ac