PKA then phosphorylates PTP1B on serine 205, increasing the phosphatase's activity. This heightened phosphatase function dephosphorylates the insulin receptor on critical tyrosine residues ...

Harada et al. 3 have now identified PKA as the kinase that phosphorylates serine 112 of BAD. They did this by purifying the kinase activity, which was present principally in heavy membrane ...