Soluble receptor activator of nuclear factor-κB (sRANK) also known as TNF receptor superfamily member 11a (TNFRSF11A), is encoded by the gene mapped to human chromosome 18. The encoded protein belongs to the tumor necrosis factor (TNF) receptor superfamily.
[1] RANK is widely expressed in variety of tissues, including skeletal muscle, thymus, liver, colon, small intestine, adrenal gland, osteoclast, mammary gland epithelial cells, prostate and pancreas.
[2] Recombinant human sRANK receptor is a 19.3kDa polypeptide containing the TNFR homologous cysteine rich portion of the extracellular domain of RANK receptor (175 amino acid residues).