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 S44-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 T66-p , S93-p
P38A T66-p , S93-p
PKACA S44-p
PKCT S44-p , S246-p
Phosphatases, in vitro:
PPP1CA S44-p
Putative upstream phosphatases:
PPP1CA S44-p
Treatment:
8-Rp-cAMP S44-p
anti-CD28 S246-p
anti-CD3 S44-p
calyculin_A S44-p
cAMP_analog S44-p
ceramide S44-p
H-89 S44-p
JAK_inhibitor_I S44-p
okadaic_acid S44-p
phorbol_ester S44-p , S246-p
prostaglandin_E S44-p
rottlerin S246-p