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.

Abl Y394-p , Y395-p
Chk1 S251-p , S302-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.

Chk1 S251-p , S302-p
Regulatory protein:
EGFR Y394-p
VHL S273-p , S276-p , S326-p
EGF S251-p , S302-p , Y394-p , Y458-p
gefitinib Y394-p , Y395-p
hypoxia S273-p , S276-p , S326-p
metastatic potential S251-p , S302-p
MG132_withdrawal S461-p
nilotinib Y394-p , Y395-p
SB218078 S251-p , S302-p
siRNA S251-p , S302-p
Su11274 Y394-p , Y395-p