Partial sequence of cDNA 68/196. The mutated nucleotide that induces the replacement of a proline by a leucine in LG2 melanoma cells is indicated in bold. The peptide recognized by the anti-LG2-C CTLs is boxed. The acidic domain of the OS-9 protein is underlined. The complete sequence of gene OS-9 is available (GenBank Accession No. U41635).