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.

PLK4 S305-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.

PLK4 S22-p , T170-p , Y177-p , S305-p
MG115 S305-p
MG132_withdrawal S592-p , S817-p
nocodazole S499-p , S592-p , S671-p , S817-p
siRNA K45-ac , K46-ac
thymidine S499-p , S592-p , S671-p , S817-p