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 S356-p , T357-p
GRK3 S356-p , T357-p
GRK3 S369-p
GRK5 S356-p , T357-p , T363-p , S369-p
GRK6 S356-p , T357-p , T363-p , S369-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.

GRK3 S369-p
Treatment:
chelerythrine T363-p , S369-p
etorphine S356-p , T363-p , S369-p
GF109203X S356-p , T357-p , T363-p , S369-p
Go_6976 S356-p , T357-p , T363-p , S369-p
NBNI S369-p
norBNI S356-p , T357-p , T363-p , S369-p
phorbol_ester S356-p , T357-p , T363-p , S369-p
PTX S356-p , T357-p , T363-p , S369-p
swim stress S369-p
U50488 S356-p , T357-p , T363-p , S369-p