Ras family genes are common targets for somatic mutations in human cancer: KRAS is frequently mutated in lung carcinomas, whereas HRAS mutations are common in skin tumors. Allan Balmain and colleagues use genetic engineering of ras genes in mice to show that specificity for ras mutations is determined by local regulatory elements, and that Kras 4A is the major oncogenic isoform of Kras.
- Minh D To
- Christine E Wong
- Allan Balmain