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 S399-p
CDK2 T395-p , S399-p
GSK3A T395-p
GSK3B T395-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.

CDK2 S387-p , T395-p , S399-p
GSK3B S73-p , T77-p , T395-p
Phosphatases, in vitro:
PPP2R2A S399-p
Putative upstream phosphatases:
PPP2R2A S399-p
Treatment:
calyculin_A T77-p , T395-p , S399-p
lithium T395-p
LY294002 T395-p
seliciclib T77-p , T395-p , S399-p