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.

GSK3B S38-p , S42-p
okadaic_acid S38-p , S42-p
phorbol_ester S38-p , S42-p