β- 淀粉样蛋白 40 酶 (Aβ40)联免疫吸附试验试剂盒
| 产品描述: | 本试剂盒采用双抗夹心法 ELISA 技术,专为科研场景设计,可定量检测样本中 Aβ40 蛋白浓度,检测范围为 10-1000pg/mL,包含预包被 Aβ40 特异性捕获抗体的微孔板、HRP 标记检测抗体及配套试剂,特异性强(与 Aβ42 交叉反应率<1%,与 APP 其他片段交叉反应率<0.5%),适用于脑脊液、神经元裂解液、星形胶质细胞培养上清等样本。研究背景中,Aβ40 作为 β 淀粉样蛋白(Aβ)的主要亚型,是神经退行性模型中淀粉样斑块的核心成分,其表达异常与突触损伤、神经炎症模型进程相关,与 Aβ42 相比,Aβ40 聚集能力较弱但在斑块中含量更高,二者在病理机制中存在功能差异;机制上,Aβ40 由 APP 经 β 分泌酶(BACE1)和 γ 分泌酶切割产生,通过形成寡聚体干扰突触前膜递质释放,本试剂盒可特异性捕捉其浓度变化,解析与 Aβ42 不同的神经损伤机制。分子特征体现为含 40 个氨基酸残基(C 端为 Val40),较 Aβ42 缺失 2 个疏水氨基酸,导致聚集动力学差异;生物学意义在于作为 “淀粉样沉积标志物”,反映斑块负荷与神经退行性进程,而 Aβ42 更关联早期寡聚体毒性。实用性上,支持神经退行性模型中与 tau 蛋白磷酸化的关联研究(区别于 Aβ42 的表达时序)、APP 切割机制解析及化合物对其聚集的干预评估,为神经损伤差异机制研究提供可靠工具。 本品仅用于科研,不用于临床诊断,产品具体参数及操作步骤详见产品说明书。 |
| 别名: | β- 淀粉样蛋白 40 Aβ1-40、Amyloid β 1-40 |
| 缩写: | AFP-L3 |
| Uniprot No: | P02771 |
| 种属: | Mus musculus (Mouse) |
| 样本类型: | serum, plasma, tissue homogenates, cell culture supernates |
| 检测范围: | 10-1000pg/mL |
| 反应时间: | 1-5h |
| 样本体积: | 50-100ul |
| 检测波长: | 450 nm |
| 测定原理: | quantitative |
| 测定方法: | Sandwich |
| 货期: | 3-5 working days |
| 本试剂盒所含 材料: | A micro ELISA plat 8×12 |
| Two vials lyophilized standarde | |
| Concentrated Enzyme-Labeled Detection Antibody (100 x concentrate) 1 x 120 μl | |
| Universal Diluent 2 x 20 ml | |
| Wash Buffer (20 x concentrate) 2 x 10 ml | |
| TMB Substrate 1 x 10 ml | |
| Stop Solution 1 x 60 ml | |
| Four plate sealing film (For 96 wells) | |
| An instruction manua | |
| 精密度: | ntra-assay Precision (Precision within an assay): CV%<8% |
| Three samples of known concentration were tested twenty times on one plate to assess. | |
| Inter-assay Precision (Precision between assays): CV%<10% | |
| Three samples of known concentration were tested in twenty assays to assess. |
| 线性度: | To assess the linearity of the assay, samples were spiked with high concentrations of human ACEⅠ in various matrices and diluted with the Sample Diluent to produce samples with values within the dynamic range of the assay. | ||
| Sample | Serum(n=4) | ||
| 1:200 | Average % | 98 | |
| Range % | 96-104 | ||
| 1:400 | Average % | 95 | |
| Range % | 88-98 | ||
| 1:800 | Average % | 106 | |
| Range % | 99-111 | ||
| 1:1600 | Average % | 89 | |
| Range % | 90-99 | ||
| 回收率: | The recovery of human ACEⅠ spiked to levels throughout the range of the assay in various matrices was evaluated. Samples were diluted prior to assay as directed in the Sample Preparation section. | ||
| Sample Type | Average % Recovery | Range | |
| Serum (n=5) | 95 | 88-98 | |
| EDTA plasma (n=4) | 112 | 105-117 | |
| 标准曲线: | 这些标准曲线仅用于演示。应为每组分析的样品生成标准曲线。 | ||
| 靶点详情: | Aβ40 是 β 淀粉样蛋白(Aβ)的主要亚型,为淀粉样前体蛋白(APP)经蛋白酶切割产生的多肽片段,因 C 端终止于第 40 位氨基酸而得名。含 40 个氨基酸残基(序列为 DAEFRHDSGYEVHHQKLVFFAEDVGSNKGAIIGLMVGGVV),C 端为缬氨酸(Val40),较 Aβ42 缺失最后 2 个疏水氨基酸(Ile41、Ala42),此结构差异使其聚集形成纤维的速率慢于 Aβ42,但在淀粉样斑块中占比更高,是斑块结构的主要组成成分。与 Aβ42 相比,其在序列长度、聚集特性及病理作用上存在显著差异,是解析神经退行性模型中淀粉样沉积机制的关键分子靶点。 |
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