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.

P38A S66-p , S68-p
imatinib S66-p , S68-p
LY294002 S66-p , S68-p
retinoic_acid S66-p , S68-p
SB203580 S66-p , S68-p
wortmannin S66-p , S68-p