Dykddddk peptide | 98849-88-8

• 物质功能分类: 生物化工 - 多肽
• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: Dykddddk peptide
• 英文别名: (2S)-6-amino-2-[[(2S)-2-[[(2S)-2-[[(2S)-2-[[2-[[(2S)-6-amino-2-[[(2S)-2-[[(2S)-2-amino-3-carboxypropanoyl]amino]-3-(4-hydroxyphenyl)propanoyl]amino]hexanoyl]amino]-3-carboxypropanoyl]amino]-3-carboxypropanoyl]amino]-3-carboxypropanoyl]amino]-3-carboxypropanoyl]amino]hexanoic acid
• CAS: 98849-88-8
• 化学式: C₄₁H₆₀N₁₀O₂₀
• 分子量: 1013.0
• InChiKey: XZWYTXMRWQJBGX-DQCYEUCQSA-N

物化性质

• 密度：
  1.470±0.06 g/cm3 (20 ºC 760 Torr)
• 溶解度：
  DMSO 中≥50.65 mg/mL；水中≥210.6 mg/mL；乙醇中≥34.03 mg/mL

计算性质

• 辛醇/水分配系数(LogP)：
  -12.9
• 重原子数：
  71
• 可旋转键数：
  35
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.54
• 拓扑面积：
  526
• 氢给体数：
  17
• 氢受体数：
  23

制备方法与用途

生物活性

FLAG peptide是一种八个氨基酸组成的多肽 (Asp-Ty-rLys-Asp-Asp-Asp-Asp-Lys)，具有肠激酶切割位点。FLAG peptide用于抗体介导的重组蛋白的识别和纯化。

体外研究

Fusion protein technology has become an important tool for solving numerous problems linked to recombinant protein production. The properties of the additional tag facilitate identification and provide a one-step purification procedure of the fusion protein by passing cell extracts or supernatants through columns of an appropriate matrix. FLAG peptide allows elution under non-denaturing conditions. Several antibodies against FLAG peptide have been developed. One antibody, M1, binds the peptide in the presence of bivalent metal cations, preferably Ca ²⁺ . Elution is effected by chelating agents. Another strategy is competitive elution with excess of free FLAGe peptide. Antibodies M2 and M5 are applied in this procedure. The Flag-tag is first described as a calcium-dependent epitope of a monoclonal antibody. It is a highly acidic octapeptide which can be N-terminally fused to the protein of interest. As a very hydrophilic peptide the Flag–tag has a high surface probability. Flag-fusion proteins can be captured by an immunoaffinity column in the presence of Ca ²⁺ and eluted byEDTA at low concentrations, neutral pH and thus, nearly physiological conditions.

多肽

FLAG Peptide（Flag-tag Peptide）是编码8个氨基酸的亲水性多肽（DYKDDDDK），含有肠激酶酶切位点，可用于免疫亲和层析。Flag多肽可在非变性条件下洗脱蛋白，有多种抗体可识别Flag多肽，如M1、M2和M5。

参考质量标准

外观:白色粉末
纯度(HPLC) ≥98.0%
醋酸根含量≤12.0%
水分含量≤8.0%
肽含量≥80.0%
内毒素≤50EU/mg
氨基酸组成分析≤±10%