Ready-to-use ELISA kits are available for the detection of fish, an alias of the protein, SH3 and PX domains 2A. The official gene symbol is SH3PXD2A. The protein, with a mass of 125.3 kDa and length of 1133 residues, is reported to be cytoplasmic. It is a member of the SH3PXD2 family and may be known by other names, including: FISH, tyrosine kinase substrate with five SH3 domains, adaptor protein TKS5, adapter protein TKS5, SH3 multiple domains 1, and SH3 and PX domain-containing protein 2A, and TKS5.