BD-2 蛋白, Human

BD-2 Protein, Human is an anti-microbial peptide that participates in the response to microbial invasion.

人类 β-防御素-2 (HBD-2) 是一种有效的抗微生物肽，是先天免疫反应的一部分。HBD-2 是一种存在于羊水中的天然抗菌肽，参与宿主对羊膜腔微生物入侵的反应^[1]。与 hBD-1 不同，第二种肽，人 β-防御素-2 (hBD-2)，在转录水平上受到与微生物接触的反应而受到调节，并且在杀死革兰氏阴性细菌方面非常有效。细胞因子肿瘤坏死因子-α^[2] 也会上调其表达。

1.Full biological activity determined by a chemotaxis bioassay using immature human dendritic cells is in a concentration range of 10-100 ng/mL.
2.Measured by its ability to chemoattract THP-1 cells. The ED₅₀ for this effect is 65.46 ng/mL, corresponding to a specific activity is 1.528×10⁴U/mg.
3.Measured by its ability to chemoattract immature human dendritic cells. The ED₅₀ for this effect is 65.16 ng/mL, corresponding to a specific activity is 1.535×10⁴ U/mg.

• 
  Measured by its ability to chemoattract THP-1 cells. The ED₅₀ for this effect is 65.46 ng/mL, corresponding to a specific activity is 1.528×10⁴ U/mg.

Human

E. coli

Tag Free

O15263 (G24-P64)

1673  [NCBI]

GIGDPVTCLKSGAICHPVFCPRRYKQIGTCGLPGTKCCKKP

Approximately 4.3-9 kDa

• 
  Greater than 95% as determined by reducing SDS-PAGE.

无菌粉末

Lyophilized after extensive dialysis against 20 mM PBS, pH 7.4, 130 mM NaCl or PBS, pH 7.4.

<1 EU/μg, determined by LAL method.

It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH₂O. For long term storage it is recommended to add a carrier protein (0.1% BSA, 5% HSA, 10% FBS or 5% Trehalose).

Stored at -20°C for 2 years. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer (with carrier protein). It is recommended to freeze aliquots at -20°C or -80°C for extended storage.

Room temperature in continental US; may vary elsewhere.

• [1]. Soto E, et al. Human beta-defensin-2: a natural antimicrobial peptide present in amniotic fluid participates in the host response to microbial invasion of the amniotic cavity. J Matern Fetal Neonatal Med. 2007 Jan;20(1):15-22.  [Content Brief]

  [2]. Harder J, et al. Mucoid Pseudomonas aeruginosa, TNF-alpha, and IL-1beta, but not IL-6, induce human beta-defensin-2 in respiratory epithelia. Am J Respir Cell Mol Biol. 2000 Jun;22(6):714-21.  [Content Brief]