Ras Peptide VAL

**Semantic type:** Amino Acid, Peptide, or Protein|Immunologic Factor

**Definition:** A synthetic form of the Ras peptide containing a point mutation at position 12 (glycine to valine) with potential antineoplastic activity. Vaccination with this peptide may stimulate the host immune system to mount a cytotoxic T lymphocyte (CTL) response against tumor cells positive for this Ras mutation, resulting in decreased tumor growth. (NCI04)