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.

PKACA T321-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.

ERK2 T321-p
P38A T321-p
PKACA T321-p
PKACA T321-p
blast-induced traumatic brain injury S239-p , S240-p
gly-aCSF S239-p , S240-p
long-term_potentiation S239-p , S240-p
roflumilast S239-p , S240-p