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.

PERK 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.

ERK2 S52-p
HRI S49-p , S52-p
P38A S52-p
PERK S49-p , S52-p
PKR S49-p , S52-p
RSK2 S52-p
Phosphatases, in vitro:
PPP1CA S52-p
Putative upstream phosphatases:
PPP1CA S52-p
PPP1CA S52-p
Regulatory protein:
ERK1 S52-p
ERK2 S52-p
GADD34 S52-p
NCK1 S52-p
NCK2 S52-p
OLA1 S52-p
P38A S52-p
PERK S52-p
PKR S52-p
PKR S52-p
PPP1R15B S52-p
Raptor S52-p
RHEB S52-p
XIAP S52-p
15-deoxyspergualin S52-p
2-deoxyglucose S52-p
6-OHDA S52-p
A23187 S52-p
afatinib S52-p
amino_acid_starvation S52-p
anisomycin S52-p
arsenite S52-p
cisplatin S52-p
cobalt S52-p
DMAT S52-p
double-stranded_RNA S52-p
DTT S52-p
fasting S52-p
glucose S52-p
glucose_starvation S52-p
H2O2 S52-p
hyperoxia S52-p
hypoxia S52-p
hypoxia/reoxygenation S52-p
IFN-alpha S52-p
IFN-beta S52-p
insulin S52-p
ischemia S158-p
LY294002 S52-p
MG132 K143-ub
osmotic_stress S52-p
ouabain S52-p
oxaliplatin S52-p
PD98059 S52-p
PERK inhibitor 1 S52-p
phorbol_ester S52-p
pictilisib S52-p
PKR_inhibitor S52-p
rapamycin S52-p
rotenone S52-p
salubrinal S52-p
SB202474 S52-p
SB203580 S52-p
selisistat K143-ac
sildenafil S52-p
siRNA K143-ac
sorafenib S52-p
thapsigargin S52-p
TNF S52-p
tunicamycin S52-p
UV S52-p
vanadate S52-p
virus infection S52-p