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 S280-p , S288-p
ERK2 S280-p , S288-p
PKACA S1050-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.

ERK1 S280-p
ERK2 S280-p , S288-p
GSK3B S373-p
PKACA S834-p , S1050-p
PD98059 S288-p
U0126 S280-p