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 T28-p , S36-p , S38-p , S40-p , S527-p , S530-p
ERK2 T28-p , S36-p , S38-p , S40-p , S527-p , S530-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.

ERK2 T28-p , S36-p , S38-p , S40-p , S527-p , S530-p
Treatment:
As2O3 T28-p , S36-p , S38-p , S40-p , S527-p , S530-p
U0126 T28-p , S36-p , S38-p , S40-p , S527-p , S530-p