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.

CDK2 S210-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 T191-p , S210-p , S913-p
CDK2 T191-p , S210-p , S913-p
Regulatory protein:
ATM S210-p
PRP4 S210-p
BI2536 S227-p , S236-p
EMS S210-p
H2O2 S210-p
ionizing_radiation S210-p
ischemia S472-p
MLN8054 S227-p
MS275 K316-ac
nocodazole T209-p , S210-p
taxol S227-p , S236-p , T244-p
wortmannin S210-p