人们认为,由ras癌基因编码的蛋白质能引起某些类型癌细胞转化表型的表达。ras蛋白家族由几个成员组成,在人类细胞包括正常的(原癌基因)和突变的(癌基因)形式。一般认为,原癌基因与细胞正常生长的控制有关;而突变形式(显然是由正常ras基因的体细胞突变所致)似乎部分地与正常生长 It is thought that proteins encoded by ras oncogenes can cause the expression of certain types of cancer cell transformed phenotypes. The ras protein family consists of several members, including normal (protooncogene) and mutated (oncogene) forms in human cells. It is generally believed that proto-oncogenes are involved in the control of normal cell growth; while the mutated forms (apparently due to somatic mutation in the normal ras gene) appear to be partially associated with normal growth.