96-well Cell Adhesion Assay
(Fibronectin Coated, Fluorometric Assay)
Catalog Number: ECM-1023 96 assays
Storage: Upon arrival store the components at 4C.
Introduction: Due to its diverse nature and composition, the ECM can serve many functions, such as providing support and anchorage for cells, segregating tissues from one another, and regulating intercellular communication. The ECM regulates a cell"s dynamic behavior. In addition, it sequesters a wide range of cellular growth factors, and acts as a local depot for them. Changes in physiological conditions can trigger protease activities that cause local release of such depots. This allows the rapid and local growth factor-mediated activation of cellular functions, without de novo synthesis.
Formation of the extracellular matrix is essential for processes like growth, wound healing and fibrosis. An understanding of ECM structure and composition also helps in comprehending the complex dynamics of tumor invasion and metastasis in cancer biology as metastasis often involves the destruction of extracellular matrix by enzymes such as serine and Threonine proteases and Matrix metalloproteinase.
Biopioneer 96-well Cell Adhesion Microplate Assays are designed for the determination of the relative attachment of adherent cell lines to extracellular matrix proteins such as clooagen I, collagen IV, Firbronectin and vitronectin.
Principle of the assay
BioPioneer 96-well Cell Adhesion Assays are designed for the determination of cell attachment to ECM proteins. After incubation followed by a brief wash step, attached cells are quantified with fluorescent dye. BSA-coated wells serve as a negative control, and poly-L-lysine-coated wells serve as a positive control for general attachment.
Materials Provided
1. Fibronectin Adhesion Plate (Part No. ECM-10113): One 96-well plate containing 72 Bovine Fibronectin coated wells , 8 BSA-coated wells and 8 poly-lysine coated wells(see layout below)
2. Fluorecent dye Solution(Part #: 10003): 50 ul in an amber vial
3. PBS
Materials Not Supplied
1. Cell culture medium
2. Serum free medium, such as DMEM containing 0.5% BSA, 2 mM CaCl2 and 2 mM MgCl2
4. 1XD PBS
5. 96-well microtiter plate
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启动子是RNA聚合酶能够识别并与之结合,从而起始基因转录的一段DNA序列,通常位于基因上游.一个典型的启 动子包括CAAT-box和TATA-box,它们分别依赖DNA的RNA聚合酶的识别和结合位点,一般位于转录起始位点上游几十个碱基处.在核心启动子上 游通常会有一些特殊的DNA序列,即顺式作用元件,转录因子与之结合从而激活或抑制基因的转录.一旦RNA聚合酶定位并结合在启动子上即可 启动基因转录,因此启动子是基因表达调控的重要元件,它与RNA聚合酶及其他蛋白辅助因子等反式作用因子的相互作用是启动子调控基因转录的实质.
根据启动子的转录模式可将其分为3类:组成型启动子、组织或器官特异性启动子和诱导型启动子.
似乎都是鉴定目的基因是否导入受体细胞 没有鉴定是否成功导入质粒的 鉴定目的基因是否导入受体细胞有四个层次 1 直接鉴定受体细胞中是否有目的基因 用DNA分子杂交 2 鉴定目的基因是否转录 分子杂交(mRNA) 3 目的基因是否表达 抗原-抗体 (蛋白质) 4 看受体细胞发育成的个体是否表现出相关性状
各位大神,我现在用PET28α作为表达载体,在连接的时候是不是载体要进行双酶切、胶回收?我双酶切的目的片段和PET28α连接后,导入感受态中没有成功,不知道怎么回事,请教各位。
2、基因表达载体的构建
(1)目的:使目的基因在受体细胞中稳定存在并且可以遗传给下一代并表达和发挥作用.(2)基因表达载体的组成:目的基因+启动子+终止子+标记基因
②启动子在基因的首段,它是RNA聚合酶的结合位点,能控制着转录的开始,故②正确;
③终止子在基因的尾端,它控制着转录的结束,故③正确;
④由于受体细胞有植物、动物以及微生物之分,以及目的基因导入受体细胞的方法不同,因此基因表达载体的构建是不完全相同的,

