Anti-FTHS antibodies are protein reagents that detect specific antigens. The FTHS antigen is another term for the human protein SH3 and PX domains 2B, encoded by the SH3PXD2B gene. The protein is known to be an adapter protein involved in invadopodia and podosome formation and extracellular matrix degradation. Canonically, it has an amino acid length of 911 residues and a mass of 101.6 kilodaltons. Its subcellular localization is in the cytoplasm and it is reported to be expressed in fibroblasts. The FTHS protein is a member of the SH3PXD2 protein family.