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.

DYRK1B Y271-p , Y273-p , S421-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.

DYRK1B Y271-p , Y273-p
ERK2 S421-p
Regulatory protein:
KRas S421-p
MKK3 Y271-p , Y273-p
RAC1 Y271-p , Y273-p
4-HT S421-p
angiotensin-(1-7) Y273-p
antibody Y273-p
AZ191 S421-p
HGF Y273-p
ischemia S421-p
LRRK2-IN-1 Y273-p
metastatic potential Y273-p
U0126 Y63-p