Activin RIA/ALK-2/Activin Receptor Type 1 Antibody


PC‑3 human prostate cancer cell line was stained with Goat Anti-Human Activin RIA/ALK‑2 Antigen Affinity‑purified Polyclonal Antibody (Catalog # AF637, filled histogram) or control antibody (Catalog # AB-108-C, more
Activin RIA/ALK-2 was detected in immersion fixed paraffin-embedded sections of human astrocytoma using 15 µg/mL Goat Anti-Human Activin RIA/ALK-2 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF637) more
Activin RIA/ALK-2 was detected in immersion fixed paraffin-embedded sections of human placenta using Goat Anti-Human Activin RIA/ALK-2 Antigen Affinity-purified Polyclonal Antibody (Catalog # AF637) at 15 µg/mL more

Product Details

Reactivity HuSpecies Glossary
Applications WB, Flow, IHC, CyTOF-ready

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Activin RIA/ALK-2/Activin Receptor Type 1 Antibody Summary

S. frugiperda insect ovarian cell line Sf 21-derived recombinant human Activin RIA/ALK-2
Accession # Q04771
Detects human Activin RIA/ALK‑2 in direct ELISAs and Western blots. In direct ELISAs, less than 1% cross-reactivity with recombinant human (rh) Activin RIB, rhActivin RIIA, and rhActivin RIIB is observed.
Immunogen affinity purified
Purity Statement
Antigen Affinity-purified
Innovator's Reward
Test in a species/application not listed above to receive a full credit towards a future purchase.


  • CyTOF-ready
  • Flow Cytometry 2.5 ug/10^6 cells
  • Immunohistochemistry 5-15 ug/mL
  • Western Blot 0.1 ug/mL
Read Publications using
AF637 in the following applications:

Packaging, Storage & Formulations

Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 12 months from date of receipt, -20 to -70 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
  • 6 months, -20 to -70 °C under sterile conditions after reconstitution.
Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied either lyophilized or as a 0.2 µm filtered solution in PBS.
No Preservative
Immunogen affinity purified
Reconstitution Instructions
Reconstitute at 0.2 mg/mL in sterile PBS.


This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.

Alternate Names for Activin RIA/ALK-2/Activin Receptor Type 1 Antibody

  • activin A receptor, type I
  • Activin RIA
  • ActivinRIA
  • ACVR1
  • ACVR1A
  • ALK2
  • ALK-2
  • FOP
  • SKR1
  • TSRI


Activin isoforms and other members of the TGF-beta superfamily exert their biological effects by binding to heteromeric complexes of a type I and a type II serine‑threonine kinase receptor, both of which are essential for signal transduction. To date, seven type I and five type II receptors, including the two type I and the two type II activin receptors, designated ActR-I(A), ActR-IB, ActR-II(A), and ActR-IIB, have been cloned from mammals. Through alternative mRNA splicing, multiple ActR-IIB isoforms can also be generated, adding to the complexity of the activin receptor system. Different activin isoforms bind with different high-affinities to the various type II isoforms. Type I activin receptors do not bind directly to activin but will associate with the type II receptor-activin complex and initiate signal transduction. Besides the activin isoforms, ActR-II will also bind inhibin, BMP-2 and BMP-7 with lower affinities. ActR-I can also bind and form signaling complexes with the BMP-2/7-bound BMPR-II. Activin type I receptors are highly conserved. Human, mouse and bovine type IA activin receptors share greater than 98% amino acid sequence homology. Recombinant soluble activin type I receptor does not bind activin.

  1. Attisano, L. et al. (1996) Mol. and Cell. Biol. 16:1066.
  2. Woodruff, T.K. (1998) Biochem. Pharmacology 55:953.


This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.

Publications for Activin RIA/ALK-2/Activin Receptor Type 1 Antibody (AF637)(9)

We have publications tested in 1 confirmed species: Human.

We have publications tested in 2 applications: Flow Cytometry, Western Blot.

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Showing Publications 1 - 9 of 9.
Publications using AF637 Applications Species
John B. Lees-Shepard, Sean J. Stoessel, Julian T. Chandler, Keith Bouchard, Patricia Bento, Lorraine N. Apuzzo et al. An anti-ACVR1 antibody exacerbates heterotopic ossification by fibro-adipogenic progenitors in fibrodysplasia ossificans progressiva mice Journal of Clinical Investigation 2022-06-15 [PMID: 35503416]
Pramod DHAKAL, Nobuo TSUNODA, Yasuo NAMBO, Hiroyuki TANIYAMA, Kentaro NAGAOKA, Gen WATANABE et al. Circulating activin A during equine gestation and immunolocalization of its receptors system in utero-placental tissues and fetal gonads Journal of Equine Science 2021-06-18 [PMID: 34220270]
Wei Lin, Wen-Wen Zhang, Ning Lyu, Hong Cao, Wen-Dong Xu, Yu-Qiu Zhang Growth Differentiation Factor-15 Produces Analgesia by Inhibiting Tetrodotoxin-Resistant Nav1.8 Sodium Channel Activity in Rat Primary Sensory Neurons Neuroscience Bulletin 2021-09-01 [PMID: 34076854]
Maëva Chauvin, Véronique Garambois, Sylvie Choblet, Pierre-Emmanuel Colombo, Myriam Chentouf, Laurent Gros et al. Anti-Müllerian hormone concentration regulates activin receptor-like kinase-2/3 expression levels with opposing effects on ovarian cancer cell survival International Journal of Oncology 2021-05-17 [PMID: 34013359]
P Toofan, C Busch, H Morrison, S O'Brien, H Jørgensen, M Copland, H Wheadon Chronic myeloid leukaemia cells require the bone morphogenic protein pathway for cell cycle progression and self-renewal Cell Death Dis, 2018-09-11;9(9):927. 2018-09-11 [PMID: 30206237] (Flow Cytometry, Human) Flow Cytometry Human
L Tengroth, J Arebro, O Larsson, C Bachert, SK Georén, LO Cardell Activation of Activin receptor-like kinases curbs mucosal inflammation and proliferation in chronic rhinosinusitis with nasal polyps Sci Rep, 2018-01-24;8(1):1561. 2018-01-24 [PMID: 29367682] (Flow Cytometry, Human) Flow Cytometry Human
Bolander J, Ji W, Geris L et al. The combined mechanism of bone morphogenetic protein- and calcium phosphate-induced skeletal tissue formation by human periosteum derived cells. Eur Cell Mater. 1/5/2016 [PMID: 26728496]
Fujimoto M, Ohte S, Shin M, Yoneyama K, Osawa K, Miyamoto A, Tsukamoto S, Mizuta T, Kokabu S, Machiya A, Okuda A, Suda N, Katagiri T Establishment of a novel model of chondrogenesis using murine embryonic stem cells carrying fibrodysplasia ossificans progressiva-associated mutant ALK2. Biochem Biophys Res Commun, 2014-11-15;455(3):347-52. 2014-11-15 [PMID: 25446088] (Flow Cytometry, Human) Flow Cytometry Human
Masood R, Kumar SR, Sinha UK, Crowe DL, Krasnoperov V, Reddy RK, Zozulya S, Singh J, Xia G, Broek D, Schonthal AH, Gill PS EphB4 provides survival advantage to squamous cell carcinoma of the head and neck. Int. J. Cancer, 2006-09-15;119(6):1236-48. 2006-09-15 [PMID: 16615113] (Western Blot, Human) Western Blot Human

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Gene Symbol ACVR1