Antigen, recognized on melanoma by autologous cytolytic T-lymphocytes. Expressed in a variety of tumor tissues but not in normal tissues, except testis. This gene belongs to a family of genes organized in clustered repeats. They have a high degree of predicted sequence identity, but differ by scattered single nucleotide substitution. Their sequences contain either the antigenic peptide YYWPRPRRY or YRPRPRRY which is recognized by cytotoxic T-cells. Belongs to the GAGE family. Product of a dubious gene prediction. Van den Eynde et al (PubMed:7544395) identified this gene on chromosome X, however it is not currently present in the reference genome assembly (GRCh38/hg38).