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.

GCN2 S52-p
PERK S52-p
PKR S52-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.

PKR S52-p
Phosphatases, in vitro:
PPP1CA S52-p
PPP1CA S52-p
PPP1R15B S52-p
Regulatory protein:
Akt1 S52-p
Akt2 S52-p
Akt3 S52-p
ATF-4 S52-p
DDIT3 S52-p
DUSP1 S52-p
GADD34 S52-p
GCN2 S52-p
IRE1 S52-p
NCK1 S52-p
NCK1 S52-p
NCK2 S52-p
PERK S52-p
PKR S52-p
PPP1R15B S52-p
XIAP S52-p
2-AP S52-p
2-deoxyglucose S52-p
adriamycin S52-p
Akt_inhibitor_VIII S52-p
amino_acid_starvation S52-p
arsenite S52-p
cycloheximide S52-p
diamide S52-p
disulfiram S52-p
double-stranded_RNA S52-p
DTT S52-p
exercise S52-p
fasting S52-p
Freund's_complete_adjuvant S52-p
glucagon S52-p
glucose S52-p
H-89 S52-p
H2O2 S52-p
heparin sodium S52-p
histidinol S52-p
hypoxia S52-p
IFN-alpha S52-p
IFN-gamma S52-p
LY294002 S52-p
mannose S52-p
obesity-inducing diet S52-p
okadaic_acid S52-p
poly(I-C) S52-p
rapamycin S52-p
Sal003 S52-p
serum_withdrawal S52-p
siRNA S52-p
SP600125 S52-p
thapsigargin S52-p
TNF S52-p
tunicamycin S52-p
UV S52-p
virus infection S52-p