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.

MEK1 S218-p , S222-p
PAK1 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.

BRAF S218-p , S222-p
CDK1 T286-p , T292-p
MEK1 S218-p , S222-p
MEKK1 S218-p , S222-p
PAK2 S298-p
PAK3 S298-p
PAK3 S298-p
Regulatory protein:
PAK1 S218-p , S222-p , S298-p
Treatment:
adrenalectomy S212-p , S218-p
AG879 S218-p , S222-p
BDNF S218-p , S222-p
EGF S218-p , S222-p , S298-p
fibronectin S218-p , S222-p , S298-p
insulin S212-p , S218-p
LY294002 S218-p , S298-p
metoprolol S212-p , S218-p
NGF S218-p , S222-p
NSC23766 S218-p , S222-p
okadaic_acid S218-p , S222-p
PD98059 S218-p , S222-p
PDGF S218-p
PP2 S218-p , S222-p , S298-p
Ro31-8220 S218-p , S222-p
RS5444 S298-p
tautomycin S218-p , S222-p
TeTx S218-p , S222-p
thrombin S218-p
urofollitropin S218-p , S222-p
vanadate S218-p , S222-p
wortmannin S218-p , S222-p