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.

ERK1 S343-p , T346-p , S351-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.

CK2A1 S482-p , S484-p , S488-p , S489-p , S497-p
ERK2 S296-p , S308-p
Regulatory protein:
LAT S351-p
PRKD1 S308-p
SLP76 S351-p
angiotensin_2 S308-p
EGF T129-p , S257-p , S259-p , S298-p , S308-p , S343-p , T346-p , S351-p
gefitinib Y155-p
LRRK2-IN-1 S308-p
PDGF Y150-p
plerixafor S351-p
serum_starvation S257-p , S259-p , S296-p , S298-p , S308-p , S497-p
SII_angiotensin_2 S308-p
U0126 S343-p , T346-p , S351-p
virus infection S351-p