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Manufactured by BioVendor

sRANK (soluble RANK Receptor) Human, Rabbit Polyclonal Antibody

  • Regulatory status:RUO
  • Type:Polyclonal Antibody
  • Other names:Receptor Activator for Nuclear Factor κ B Ligand, osteoprotegerin ligand, TNF-related activation-induced cytokine, soluble Receptor Activator of NFkB Ligand, TNFSF11, TRANCE (TNF-related activation-induced cytokine), OPGL, ODF (Osteoclast differentiation factor)
  • Species:Human
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Cat. No. Size Price

RD181077100 0.1 mg
PubMed Product Details
Technical Data


Polyclonal Antibody


Western blotting

Source of Antigen

E. coli




The antibody was raised in rabbits by immunization with the recombinant Human RANK.

Amino Acid Sequence

The immunization antigen (19.3 kDa) is a protein containing 175 amino acid residues, comprising of the full-length of the TNF receptor-like extracellular domain of RANK receptor.

Species Reactivity

Human. Not yet tested in other species.

Purification Method

Immunoaffinity chromatography on a column with immobilized recombinant Human RANK.

Antibody Content

0.1 mg (determined by BCA method, BSA was used as a standard)


The antibody is lyophilized in 0.05 M phosphate buffer, 0.1 M NaCl, pH 7.2. AZIDE FREE.


Add 0.2 ml of deionized water and let the lyophilized pellet dissolve completely. Slight turbidity may occur after reconstitution, which does not affect activity of the antibody. In this case clarify the solution by centrifugation.


At ambient temperature. Upon receipt, store the product at the temperature recommended below.


The lyophilized antibody remains stable and fully active until the expiry date when stored at -20°C. Aliquot the product after reconstitution to avoid repeated freezing/thawing cycles and store frozen at -80°C. Reconstituted antibody can be stored at 4°C for a limited period of time; it does not show decline in activity after one week at 4°C.

Quality Control Test

Indirect ELISA – to determine titer of the antibody SDS PAGE – to determine purity of the antibody BCA - to determine quantity of the antibody


This product is for research use only.


Research topic

Bone and cartilage metabolism, Oncology


sRANKL, receptor activator of nuclear factor (NF)-κB ligand (also: osteoprotegerin ligand, OPGL), is a part of the TNF superfamily with high similarity to other members of that protein species. (SwissProt Nr. O14788). Three isoforms are produced by alternate splicing, two type II membrane proteins (ISOFORM 1, 317 AA, and ISOFORM 3, 270 AA), and a secreted molecule (ISOFORM 2, 244 AA). ISOFORM 1 is identical to previously reported RANKL and possesses intracellular, transmembrane, and extracellular domains; ISOFORM 2 does not have the intracellular and transmembrane domains, and ISOFORM 3 does not have the intracellular domain. A soluble form arises by proteolytic processing from membrane isoforms. Although all forms are bioactive, the membrane-bound proteins seem to be the homeostatic forms, while the production of soluble RANKL signals pathological conditions. RANKL, RANK, and osteoprotegerin (OPG) have been identified as the key molecular regulation system for bone remodelling. RANKL is the main stimulatory factor for the formation of mature osteoclasts and is essential for their survival. Therefore, an increase in RANKL expression leads to bone resorption and bone loss. RANKL is produced by osteoblastic lineage cells and activated T lymphocytes. It activates its specific receptor RANK, which is located on osteoclasts and dendritic cells. The effects of RANKL are counteracted by OPG, which is secreted by various tissues and acts as an endogenous soluble receptor antagonist. Imbalances of the RANKL/OPG system have been related to the pathogenesis of Paget’s disease, benign and malignant bone tumors, postmenopausal osteoporosis, rheumatoid arthritis, bone metastases and hypercalcemia. Several studies using animal models have shown that restoring the RANKL/OPG balance (e.g. by administering OPG) reduces the severity of these disorders. Indication - Postmenopausal and senile osteoporosis - Diseases with locally increased bone resorption activity - Paget´s disease - Periodontal disease - Cardiovascular disease, arterial calcification - Inflammatory diseases - Immunological disorders - Arthritis - Oncology

Summary References (14)

References to RANKL

  • Hofbauer L.C et al. Effect of oral contraceptives on circulatingosteoprotegerin and soluble RANK ligand serum levels in healthy young women. Clin Endocrinol (2004) 60: 214–219
  • Ito S. et al. Crystal structure of the extracellular domain of mouse ligand at2.2-A resolution. J Biol Chem (2002) 22: 6631–6636.
  • Lam J. et al. Crystal structure of the TRANCE/RANKL cytokine reveals determinants of receptorligand specifity. J Clin Invest (2001) 108: 971–979.
  • Lacey D.L, et al., Osteoprotegerin ligand is a cytokine that regulates osteoclast differentiation and activation. Cell (1998), 93:165–176.
  • Kong Y.Y. et al., OPGL is a key regulator of osteoclastogenesis, lymphocyte development and lymph-node organogenesis. Nature (1999), 397: 315–323.
  • Hsu H. et al., Tumor necrosis factor receptor family member RANK mediates osteoclast differentiation and activation induced by osteoprotegerin ligand. Proc Natl Acad Sci (1999), 96:3540–3545.
  • Josien R. et al, TRANCE, a tumor necrosis factor family member, enhances the longevity and adjuvant properties of dendritic cells in vivo. J Exp Med (2000), 191: 495–502.
  • Fuller K. et al., TRANCE is necessary and sufficient for osteoblast-mediated activation of bone resorption in osteoclasts. J Exp Med (1998), 188: 997–1001.
  • Nakashima T. et. al., Protein expression and functional difference of membrane-bound and soluble receptor activator of NF-kappaB ligand: modulation of the expression by osteotropic factors and cytokines. Biochem Biophys Res Commun (2000), 275(3):768–775.
  • Kong Y.Y. et al., Activated T cells regulate bone loss and joint destruction in adjuvant arthritis through osteoprotegerin ligand. Nature (1999), 402: 304–309.
  • Hofbauer L.C. & A.E. Heufelder, Role of receptor activator of nuclear factor-KB ligand and osteoprotegerin in bone cell biology. J Mol Med (2001), 79: 243–253.
  • Hofbauer L.C. & A.E. Heufelder, The Role of Osteoprotegerin and Receptor Activator of Nuclear Factor κB Ligand in the Pathogenesis and Treatment of Rheumatoid Arthritis. Arthritis & Rheumatism (2001), 44:253–259.
  • Hofbauer LC, et al. The role of receptor activator of nuclear factor-kappaB ligand and osteoprotegerin in the pathogenesis and treatment of metabolic bone diseases. J Clin Endocrinol Metab (2000), 85: 2355–2363.
  • Teitelbaum S.L., Bone resorption by osteoclasts. Science (2000), 289: 1504–1508.
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