Anti-FKBP12 antibodies enable researchers to detect and measure the FKBP12 antigen in biological samples. This target is a reported synonym of the FKBP1A gene, which encodes FKBP prolyl isomerase 1A. This protein is known to function in NF-kappaB signaling pathways, among other biological roles. The human version of FKBP12 has a canonical amino acid length of 108 residues and a protein mass of 12 kilodaltons. It is reported to be localized in the membrane and cytoplasm of cells. FKBP12 is a member of the FKBP-type PPIase protein family.