NCIt definition : A family of genes that encode structurally similar small GTPases involved in a variety
of signal transduction pathways. Mutation of genes in this family is associated with
cancer.;
Alternative definition : NCI-GLOSS: A family of genes that may cause cancer when they are mutated (changed).
They make proteins that are involved in cell signaling pathways, cell growth, and
apoptosis (cell death). Agents that block the actions of a mutated ras gene or its
protein may stop the growth of cancer. Members of the ras gene family include Kras,
Hras, and Nras.;