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.

p70S6K S125-p
Phosphatases, in vitro:
PPP2R2A S125-p
Putative upstream phosphatases:
PPP2CA S125-p
hypoxia S125-p
ischemia S125-p