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.

GRK2 S350-p , T352-p
GRK5 S350-p , T352-p
CCX771 S350-p , T352-p
compound_101 S350-p , T352-p
CXCL12 S350-p , T352-p
Torin1 S350-p