Cat. # | Size | Price | Inventory |
---|---|---|---|
34963S | 100 µl (50 tests) |
REACTIVITY | All |
SENSITIVITY | Endogenous |
MW (kDa) | |
Source/Isotype | Mouse IgG1 |
Product Information
Application | Dilution |
---|---|
Immunofluorescence (Immunocytochemistry) | 1:100 |
Flow Cytometry (Fixed/Permeabilized) | 1:50 |
NOTE: Prepare solutions with reverse osmosis deionized (RODI) or equivalent grade water.
NOTE: Cells should be grown, treated, fixed and stained directly in multi-well plates, chamber slides or on coverslips.
Aspirate liquid, then cover cells to a depth of 2–3 mm with 4% formaldehyde diluted in 1X PBS.
NOTE: Formaldehyde is toxic, use only in a fume hood.
NOTE: All subsequent incubations should be carried out at room temperature unless otherwise noted in a humid light-tight box or covered dish/plate to prevent drying and fluorochrome fading.
posted November 2006
revised November 2013
Protocol Id: 182
All reagents required for this protocol may be efficiently purchased together in our Intracellular Flow Cytometry Kit (Methanol) #13593, or individually using the catalog numbers listed below.
NOTE: Prepare solutions with reverse osmosis deionized (RODI) or equivalent grade water.
NOTE: When including fluorescent cellular dyes in your experiment (including viability dyes, DNA dyes, etc.), please refer to the dye product page for the recommended protocol. Visit www.cellsignal.com for a full listing of cellular dyes validated for use in flow cytometry.
NOTE: Adherent cells or tissue should be dissociated and in single-cell suspension prior to fixation.
NOTE: Optimal centrifugation conditions will vary depending upon cell type and reagent volume. Generally, 150-300g for 1-5 minutes will be sufficient to pellet the cells.
NOTE: If using whole blood, lyse red blood cells and wash by centrifugation prior to fixation.
NOTE: Antibodies targeting CD markers or other extracellular proteins may be added prior to fixation if the epitope is disrupted by formaldehyde and/or methanol. The antibodies will remain bound to the target of interest during the fixation and permeabilization process. However, note that some fluorophores (including PE and APC) are damaged by methanol and thus should not be added prior to permeabilization. Conduct a small-scale experiment if you are unsure.
NOTE: Count cells using a hemocytometer or alternative method.
posted July 2009
revised June 2020
实验步骤编号:407
预期的所有物种
通过采用对化脓性链球菌 Cas9 的氨基端特异的重组蛋白,对动物进行免疫接种来产生单克隆抗体。
CRISPR 相关蛋白 9 (Cas9) 是一种 RNA 引导的 DNA 核酸酶,并且是化脓性链球菌 CRISPR 抗病毒免疫系统的组成部分,该系统提供针对染色体外遗传物质的适应性免疫 (1)。CRISPR 抗病毒作用机制涉及三个步骤:(i) 通过宿主细菌取得外来 DNA;(ii) CRISPR RNA (crRNA) 的合成和成熟,随后形成 RNA-Cas 核酸酶蛋白质复合体;和 (iii) 通过该复合体识别外来 DNA 以及由 Cas 核酸酶活性的剪切作用进行定向干扰 (2)。II 型 CRISPR/Cas 抗病毒免疫系统可提供强有力的基因组精确编辑工具,并且具有特异性调节基因和治疗性应用的潜力 (3)。在细胞中必须引入或表达 Cas9 蛋白和引导 RNA(包含 crRNA 和反式激活 crRNA (tracrRNA) 之间的融合)。引导 RNA 5' 末端的一个 20 核苷酸序列,可以把 Cas9 引导至特定的 DNA 靶标位点。因此,可“编程” Cas9 以便在体外及在细胞和生物中切割多种 DNA 位点。CRISPR/Cas9 基因组编辑工具已经用于许多生物体中,包括小鼠和人类细胞 (4,5)。研究显示,CRISPR 可以用来在啮齿类和灵长类胚胎干细胞中产生突变等位基因或报告基因 (6-8)。
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