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.

ERK2 S298-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 S298-p
Regulatory protein:
TBK1 S438-p
EGF S89-p
ischemia S141-p
liothyronine S298-p
metastatic potential S89-p
MG132 K44-ub
SII_angiotensin_2 S85-p , S89-p
Torin1 S405-p , S412-p