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.

PAK1 S65-p , S128-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.

PAK1 S65-p , S128-p
EGF S65-p , S128-p
ephrin_B1 Y98-p
ephrin_B2 Y98-p
erlotinib Y98-p
gefitinib Y239-p
ischemia S110-p
MG132 K106-ub
PD173074 Y98-p
siRNA S65-p , S128-p
SNP S65-p , S128-p
Su11274 Y98-p
U0126 Y98-p
UV S110-p