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.

P38B T51-p
Regulatory protein:
ATF7 iso5 T53-p
MKK6 T51-p , T53-p
P38B T53-p
anti-CD3 T101-p
EGF T51-p , T53-p
ischemia T51-p , T53-p , S73-p , S97-p , T326-p
MG132 T51-p , T53-p , K389-ub
nocodazole T51-p , T53-p , T55-p , S97-p , T101-p , S182-p , S413-p
SB202190 T51-p , T53-p
U0126 T51-p , T53-p