• Species Reactivity
  Human
• Specificity
  Detects human NT-3 in direct ELISAs and Western blots. In Western blots, approximately 10% cross-reactivity with recombinant human (rh) NT‑4 is observed, and less than 1% cross-reactivity with rhBDNF is observed.
• Source
  Polyclonal Goat IgG
• Purification
  Antigen Affinity-purified
• Immunogen
  S. frugiperda insect ovarian cell line Sf 21-derived recombinant human NT-3
  Tyr139-Thr257
  Accession # P20783
• Formulation
  Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose. *Small pack size (SP) is supplied as a 0.2 µm filtered solution in PBS.
• Endotoxin Level
  <0.10 eu="" per="" 1="" μg="" of="" the="" antibody="" by="" the="" lal="">
• Label
  Unconjugated

• Western Blot
  0.1 µg/mL
  Recombinant Human NT‑3 (Catalog # 267-N3)
• Immunohistochemistry
  5-15 µg/mL
  See below
• Neutralization
  Measured by its ability to neutralize NT‑3-induced proliferation in BaF‑TrKB-BD mouse pro‑B cell line transfected with TrkB. The Neutralization Dose (ND₅₀) is typically 0.1-0.4 µg/mL in the presence of 20 ng/mL Recombinant Human NT‑3.

• Reconstitution
  Reconstitute at 0.2 mg/mL in sterile PBS.
• Shipping
  The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below. *Small pack size (SP) is shipped with polar packs. Upon receipt, store it immediately at -20 to -70 °C
• Stability & Storage
  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.

• References:
  1. Eide, F.F. et al. (1993) Exp. Neurol. 121:200.
  2. Snider, W.D. (1994) Cell 77:627.
  3. Barbacid, M. (1994) J. Neurobiol. 25:1386.
• Long Name:
  Neurotrophin 3
• Entrez Gene IDs:
  4908 (Human)
• Alternate Names:
  3-nucleotidase; NT3; NT-3; NTF3

Background:

Neurotrophin-3 (NT-3) is a member of the NGF family of neurotrophic factors (also named neurotrophins) that are required for the differentiation and survival of specific neuronal subpopulations in both the central as well as the peripheral nervous systems. The neurotrophin family is comprised of at least four proteins including NGF, BDNF, NT-3, and NT-4/5. These secreted cytokines are synthesized as prepropeptides that are proteolytically processed to generate the mature proteins. All neurotrophins have six conserved cysteine residues that are involved in the formation of three disulfide bonds and all share approximately 55% sequence identity at the amino acid level. Similarly to NGF, bioactive NT-3 is predicted to be a non-covalently linked homodimer.

The NT-3 cDNA encodes a 257 amino acid residue precursor protein with a signal peptide and a proprotein that are cleaved to yield the 119 amino acid residue mature NT-3. The amino acid sequence of mature NT-3 is identical in human, mouse and rat. NT-3 transcripts have been detected in the cerebellum, hippocampus, placenta, heart, skin, and skeletal muscle. NT-3 primarily activates the TrkC tyrosine kinase receptor. In addition, NT-3 can activate Trk and TrkB kinase receptors in certain cell systems. NT-3 can also bind with low affinity to the low affinity NGF receptor.

      R&D Systems位于美国的明尼苏达州，一直致力于生物制品的开发与生产。公司成立之初主要生产用于医院及临床应用的血控品。1997年，公司推出第一个产品--富血小板血浆质控品；1981年，公司成为全球第二家生产含血小板全血控品的供应商。40多年的发展中，R&D Systems仍持续开发各种血控品产品。  1985年，作为公司推出的第一个科研试剂产品，也是全球第一家将该产品进行商业化生产的产品，R&D Systems成功上市了TGF-beta1蛋白。作为胞外信号分子，TGF-beta1蛋白在多种细胞中进行表达，并作为胞外信号分子参与免疫功能，细胞增殖和细胞分化等生物学过程。该产品推出后，公司陆续从生物材料中纯化了几种细胞因子产品并推向市场。  天然蛋白类产品的成功推广，加速了R&D Systems在细胞因子市场的开拓。公司于1985年形成Growth Factor事业部（现Biotechnology事业部）。Biotechnology事业部的目标是生产和营销重组人细胞因子。与天然来源提取蛋白相比较，DNA重组技术生产的蛋白产品其成本更低，产量更高，完全摆脱原料的限制。1989年，Biotechnology事业部开始开发抗细胞因子的单克隆和多克隆抗体，并于1990年开发了第一个ELISA试剂盒。  2014年2月10日，R&D Systems的母公司宣布命名为Bio-Techne. Bio-Techne旗下包括R&D Systems, Novus Biologicals, BiosPacific, Tocris Bioscience, Boston Biochem和Bionostics。