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.

MARK2 S52-p
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
MARK2 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:
ADAR S52-p
AMPKA1 S52-p
ATM S52-p
beclin 1 S52-p
BRSK1 S52-p
BRSK2 S52-p
CCL20 S52-p
ERK1 S52-p
ERK2 S52-p
GADD34 S52-p
GCN2 S52-p
HRI S52-p
HSP90A S52-p
NCK1 S52-p
NCK2 S52-p
OLA1 S52-p
P38A S52-p
PERK S52-p
PKCD S52-p
PKR S52-p
PKR S52-p
PPP1R15B S52-p
Raptor S52-p
RHEB S52-p
SLC1A5 S52-p
SLC6A14 S52-p
SLC7A5 S52-p
SOD1 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
atiprimod S52-p
AzaC S52-p
BETd246 S52-p
BETd260 S52-p
ciclopirox S52-p
cisplatin S52-p
cobalt S52-p
coculture S52-p
DMAT S52-p
double-stranded_RNA S52-p
DTT S52-p
endorepelin S52-p
fasting S52-p
formylmethionine S52-p
geldanamycin S52-p
glucose S52-p
glucose_starvation S52-p
GSK2656157 S52-p
GZ17-6.02 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
methionine-deficient medium S52-p
MG132 S52-p , K143-ub
NaAsO2 S52-p
neratinib S52-p
osmotic_stress S52-p
ouabain S52-p
oxaliplatin S52-p
palbociclib 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
S-valproate S52-p
salubrinal S52-p
SB202474 S52-p
SB203580 S52-p
selisistat K143-ac
serum_starvation S52-p
sildenafil S52-p
siRNA S52-p , K143-ac
sorafenib S52-p
thapsigargin S52-p
TNF S52-p
tunicamycin S52-p
UV S52-p
vanadate S52-p
virus infection S52-p