passages.id: split_6_test_857_passage
passages.type: progene_text
passages.text: Expression of a mutant of M-Ras G22V that was no longer membrane - bound partially inhibited ( 40 % ) activation of the c-fos promoter by N-Ras Q61K , suggesting that M-Ras shared some , but not all , of the effectors of N-Ras .