Epidermal growth factor (urogastrone)-mediated phosphorylation of a 35-kDa substrate in human placental membranes: relationship to the beta subunit of the guanine nucleotide regulatory complex.

Epidermal growth factor (urogastrone)-mediated phosphorylation of a 35-kDa substrate in human placental membranes: relationship to the beta subunit of the guanine nucleotide regulatory complex.