Ready-to-use ELISA kits are available for the detection of testis expressed gene 261, an alias of the protein, testis expressed 261. The official gene symbol is TEX261. The protein, with a mass of 22.5 kDa and length of 196 residues, is reported to be membrane-associated. It is a member of the SVP26 family and may be known by other names, including: TEG-261, testis expressed sequence 261, and protein TEX261.