CoIPProtocol1
一 原理：IP是利用抗原蛋白质和抗体的特异性结合以及细菌蛋白质的“prorein A"特异性地结合到免疫球蛋白的FC片段的现象活用开发出来的方法。目前多用精制的prorein A预先结合固化在argarose的beads上，使之与含有抗原的溶液及抗体反应后，beads上的prorein A就能吸附抗原达到精制的目的。实验最需要注意点就是抗体的性质。抗体不同和抗原结合能力也不同，免染能结合未必能用在IP反应。建议仔细检查抗体的说明书。特别是多抗的特异性是问题。其次，要注意溶解抗原的缓冲液的性质。多数的抗原是细胞构成的蛋白，特别是骨架蛋白，缓冲液必须要使其溶解。为此，必须使用含有强界面活性剂的缓冲液，尽管它有可能影响一部分抗原抗体的结合。另一面，如用弱界面活性剂溶解细胞，就不能充分溶解细胞蛋白。即便溶解也产生与其它的蛋白结合的结果，抗原决定族被封闭，影响与抗体的结合，即使IP成功，也是很多蛋白与抗体共沉的悲惨结果。再次，为......阅读全文
免疫沉淀－(IP)
实验概要免疫沉淀是一种纯化蛋白质的方法。将我们感兴趣的一种蛋白质的抗体与细胞提取液孵育，以使抗体和蛋白质在溶液中结合。然后用protein A/G 耦合的琼脂糖凝胶，从样品中将抗体/抗原复合物提取出来。这种物理方法可将所需蛋白质从样品中分离。然后样品可以通过SDS-PAGE 进行分离并做 Wes
Immunofluorescence－Microscopy－Protocol
实验概要 Immunofluorescence allows the imaging of a specific factor in cells or tissue sections through the use of a specific antibody chemically whic
RNA－Isolation－Protocol
RNA Isolation Protocol(Revised 5-15-2003)Stabilize RNAStart with 15 ml E. coli Culture containing 7.5* 109 cells (OD600= 0.2 Dilute cells or scale up)
Tissue－Harvest－Protocol
TISSUES TO BE PROCURED(minimally and preferably within 5-8 hours after death):1. Brain2. Liver3. Muscle4. Skin5: Others as the specific case dictatesP
BrdU－Labeling－Protocol
实验概要The thymidine analog, 5-bromo-2-deoxyuridine (BrdU),is a common reagent used for cell proliferation assays and for the detection of apoptotic
Bacteria－Culture－Protocol
Bacteria Culture ProtocolBy 徐晓政1、TBS Medium Preparation:Prepare 1L of TBS medium contains:Tryptone 12gYeast extract 24gNaCl 5gSodium Succinate 5gGlyce
Protocol－for－Trichl...
实验概要The efficiency of nucleotide incorporation in DNA/RNA polymerization reactions (e.g. transcription, reverse transcription, and DNA replication)
Protocol－of－Northern－blot
Protocol of Northern blot质粒的转化和扩增质粒的鉴定目的基因片段的切割3.1样品双酶切(175μl水解体系)DW 115μlBuffer B(10×) 17.5μlBaM H 15μlPst I 17μlDNA(MMP-9) 16μlBSA 4.5μl37℃水浴，3h。3.2
Migration－Assay－Protocol
Materials to be prepared beforehand:1) FBS free medium2) 10% FBS medium3) Cell migration filter insert ( Transwell®, 12mm Diameter, 12 μm Pore Size.)P
Urea－Lysis－Protocol
Urea lysis buffer 9M Urea, 2.5mM EDTA, 2.5mM EGTA, 1% DTE, 4% CHAPS make 10ml and aliquot 10x1ml, freeze at -70°C Lysate prepara
Histone－blotting－protocol
实验概要 Western blot detection of histone proteins. 实验步骤 The following protocol refers to the western blot detection of histone proteins derived from p
Intracellular－Staining－Protocol
1. Fix cells- Add16% formaldehyde directly into culture medium to obtain a final concentration of 1.5% formaldehyde.2. Incubate in fixative for 10 min
Adhesion－Assay－Protocol
Materials to be prepared beforehand:1) Washing Buffer--0.1% BSA in medium (DMEM or RPMI)2) Blocking Buffer--0.5% BSA in medium (DMEM or RPMI)3) Lamini
RNA－Isolation－Protocol
Stabilize RNAStart with 15 ml E. coli Culture containing 7.5* 109 cells (OD600= 0.2 Dilute cells or scale up)Pipet 30 ml of RNAProtect Bacteria Reagen
Protocol－for－dsRNA－Synthesis
实验概要 We routinely produce dsRNA by in vitro transcription of a PCR generated DNA template containing the T7 promoter sequence on both ends
Western－Blotting－Protocol
实验概要The western blot (sometimes called the protein immunoblot) is a widely used analytical technique used to detect specific proteins in the given s
Phycoerythrin－conjugation－protocol
Phycoerythrin conjugation protocolDavid's method modified from references (2) and (3). I used this method to conjugate a mouse IgG2a monoclonal an
Basic－ELISA－Protocol
实验概要 There are many different types of ELISAs, which can detect the presence of protein in serum or supernatent. One of the most common typ
Western－Blot－Protocol
一、提取抗原蛋白将提取RNA途中留存的样品，加入150μl 100%酒精充分混匀，静置5min(RT), 2000×g , 4℃离心5min, 吸取上清至新管中, 加入750μl异丙醇, 混匀, 静置10min(RT), 12000×g, 4℃离心10min, 弃上清, 加入1ml 0.3mol/L
Protocol－for－Cell－Fusion
Healthy Sp2/0 cells should be rapidly growing by this time. Sp 2/0 cells should be started about two weeks before the cell fusion. Every two days, the
Nucleolar－Isolation－Protocol
We recommend that you first download and read this page as a PDF file. Using that as your guide, you can then follow the protocol below and view a Qui
Colony－PCR－Protocol
1. Pull out eight glycerol stock plates from the –80oC freezer and set on bench top to thaw. Be sure to remove the foil seal before leaving the plates
Immunofluorescence－Microscopy－Protocol
实验概要Immunofluorescence allows the imaging of a specific factor in cells or tissue sections through the use of a specific antibody chemically which i
Microarray－Hybridization－Protocol
Introduction:One microarray set consists of 7 nylon membranes with 2.5 x 7.5 cm dimension. 2304 genes were spotted onto nylon membranes (Schleicher an
Dot－Blot－Protocol
a. Label nitrocellulose membrane (using a pencil) to identify protein elution fractions.b . Pipette 2μl from each fraction onto the membrane, allow th
Nuclear－Extraction－Protocol
实验概要The procedure presented below describes a method for extracting nuclear from several cell lines of human origin.主要试剂Hypotonic Buffer Solution20 mM
Yale－Immunofluorescence－Protocol
实验概要We provide a protocol for fixation, immunostaining, and imaging in 384-well Plates.主要试剂Reagents1. 384-well view plates (Aurora)2. HUVEC (pooled, L
cDNA/AFLP－Protocol
Preparation of Para-magnetic beads from Promega cat#Z5482:a) suspend magnetic particles in bottle - transfer 200 ul (200 ug) of beads per sampleof RNA
Cell－Extraction－Protocol
实验概要Primary tissues are valuable tools for the study of intracellular and extracellular markers which characterize disease states. We have developed
Cytotoxicity－Assays－Protocol
Cytotoxicity Assays ProtocolCell-mediated cytotoxicity was determined by using a standard microcytotoxicity assay. Briefly, target cells were pelleted