For example, ERBB2 (HER2) cancer variant ERBB2 V777L is connected with three different gene mutation identifiers in COSMIC: COSV54062385 (coding DNA sequence—CDS—mutation c.2329G > C—substitution, Position 2329, G➞C), COSV54062767 (CDS mutation c.2329G > T—substitution, Position 2329, G➞T) and one legacy identifier COSM3718346 for which CDS mutation is not specified (CDS mutation c.? The gene discussed is ERBB2; the disease is cancer.