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.

ERK1 S527-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 S249-p , S462-p , T468-p , S491-p , S497-p , S527-p
5-HT S527-p
blood pressure S527-p
mifepristone S527-p
phorbol_ester S527-p
purvalanol S497-p , S527-p
serum S491-p , S527-p
U0126 S527-p