β- 淀粉样蛋白 42 (Aβ42)酶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 Aβ42 蛋白浓度,检测范围为 100-1000pg/mL,包含预包被 Aβ42 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 Aβ40 交叉反应率<1%),适用于脑组织匀浆、脑脊液、神经细胞培养上清等样本。Aβ42 作为淀粉样前体蛋白(APP)经 β/γ 分泌酶切割产生的肽段,是神经退行性模型中淀粉样聚集体的主要成分,其异常聚集与神经元毒性、突触丢失相关,与 Aβ40 相比,因 C 端多 2 个疏水氨基酸而更易形成纤维结构;机制上,通过 C 端 39-42 位氨基酸形成 β 折叠核心,介导分子间堆叠形成寡聚体及纤维,干扰线粒体功能与钙稳态,本试剂盒可捕捉其浓度变化以解析聚集体形成机制。分子特征体现为含 42 个氨基酸残基,C 端 Ile41/Ala42 赋予强疏水性,是区别于 Aβ40 的结构标志;生物学意义在于作为 “神经毒性聚集物前体”,参与神经退行性模型中炎症反应激活、小胶质细胞募集及神经元凋亡调控。实用性上,支持聚集体与 tau 蛋白磷酸化的关联研究、抗聚集化合物干预评估及脑脊液中 Aβ42/Aβ40 比值分析,为相关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 1-42、Aβ1-42, |
| 缩写: | Aβ42 |
| Uniprot No: | P05067 |
| 种属: | Mus musculus (Mouse) |
| 样本类型: | serum, plasma, tissue homogenates, cell culture supernates |
| 检测范围: | 100-1000pg/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 % | 92 | |
| Range % | 94-104 | ||
| 1:400 | Average % | 95 | |
| Range % | 92-98 | ||
| 1:800 | Average % | 103 | |
| Range % | 95-111 | ||
| 1:1600 | Average % | 87 | |
| Range % | 83-96 | ||
| 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 | 89-98 | |
| EDTA plasma (n=4) | 112 | 93-109 | |
| 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: | Aβ42 是 β 淀粉样蛋白家族的关键成员,为 APP 经蛋白酶切割产生的小分子肽段,因强聚集倾向在神经退行性模型中起核心作用。含 N 端柔性区、中间疏水区及 C 端 42 位氨基酸(较 Aβ40 多 Ile41/Ala42),C 端疏水残基介导 β 折叠构象形成,促进寡聚体组装,是其实现神经毒性功能的分子基础。与 Aβ40 相比,其结构差异导致功能特异性,是解析神经突触损伤机制的重要分子靶点。 |
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