passages.id: split_5_test_752_passage
passages.type: progene_text
passages.text: Immunoblotting of p185 ( neu ) - containing microvillar fractions revealed the presence in each of stably associated Shc , Grb-2 , Sos , Ras , Raf , mitogen - activated protein kinase kinase , and mitogen - activated protein kinase / extracellular signal - regulated kinase , as well as the transcription factor - phosphorylating kinase Rsk .