http://biowww.net/ Fri, 16 May 2008 06:25:25 +0100 FeedCreator 1.7.2 http://biowww.net/detail-550.html Two step Tandem Affinity Purification (TAP) system to purify protein suitable for Mass Spectrometry analysis. (By Anne-Claude Ginras, 2003). ... biowww http://biowww.net/detail-694.html The Flowchart will help you to choose: * the right domain * the right expression system * how to optimize the expression levels of the target protein * the right method for protein extraction and clarification * the purification scheme * the corre ... biowww http://biowww.net/detail-1150.html The BL21 cells are fairly fussy in that, unlike other E. coli strains, their plasmids become unstable if the cells are stored in glycerol concentrations greater than 10%. For this reason, the cells should be stored in 8% glycerol and frozen quickly in liquid n ... biowww http://biowww.net/detail-1149.html IPTG induction and bacterial growth A introduction and experimental protocol on BL21 e.coli recombinant protein expression and induction with IPTG. (Structural biology Prote ... biowww http://biowww.net/detail-349.html From Bjorkerman lab at CIT. ... biowww http://biowww.net/detail-546.html Protocol by Karl Willert in Nusse Lab at Stanford University Medical School. ... biowww http://biowww.net/detail-631.html Methods using Polyethyleneimine (PEI) precipitation and Streptomycin sulfate precipitation. By Dr. Mario Lebendiker at The Hebrew University of Jerusalem. ... biowww http://biowww.net/detail-695.html With Analytical Ultracentifugation (AUC) the following protein characteristics can be determined: * Native Molecular Mass * Stoichiometry * Assembly Models * Conformation & Shape * Diffusion & Sedimentation * Assiociation Protocol from EMBL He ... biowww http://biowww.net/detail-696.html The method of choice depends completely on the stability of the protein and on when and how you want to use it later on. In general it is important to avoid storage conditions that are close to the stability limits of the protein (e.g. extreme pH or pH values ... biowww http://biowww.net/detail-873.html Protocol from University of Missouri - Columbia Proteomics Center. 1. SDS extraction followed by acetone precipitation. 2. Phenol extraction followed by methanolic ammonium acetate precipitation. ... biowww http://biowww.net/detail-801.html A tech note from Novagen on protein solubility in e.coli expression system. The choice of vector and expression host can significantly increase the activity and amount of target protein present in the soluble fraction. Some suggestions are given in this tech n ... biowww http://biowww.net/detail-869.html Properties of Detergents Table by Dr. Shaun D. Black (University of Texas Health Center at Tyler). List of Purity, MW (monomer), CMC (mM), CMC Conditions, Aggregation, MW (micelle) of ionic, non-ionic and Zwitterionic Detergents. Detergent molecule has ... biowww http://biowww.net/detail-1156.html An introduction of recombinant protein purification and application tricks by Bill Campbell at Michigan Tech. Recombinant proteins are made from cloned DNA sequences which usually encode an enzyme or protein with known function. Special vectors (a vector is ... biowww http://biowww.net/detail-630.html A huge collection of protocols on protein purification by Dr. Mario Lebendiker at The Hebrew University of Jerusalem. ... biowww http://biowww.net/detail-35.html I've eluted some polyclonal antibodies from an antigen column, and dialysed them into a suitable buffer - the strange thing is that although the absorbance at 280nm indicates that the proteins are at a certain, relatively high level (e.g. 1mg/ml), whe ... biowww http://biowww.net/detail-57.html 1. What is the molecular basis for the selective binding of IgG by protein A? 2. What is the difference between Protein A and Protein G in relation to their Ig class binding specificities? ... ... ... biowww http://biowww.net/detail-135.html I am looking for a protein precipitation method for very low concentrated samples (50ug/ml) I have tried chloroform methanol but that doesn't work. My samples are in phosphate buffer + n-octylglucoside. ... ... ... biowww http://biowww.net/detail-197.html I am working with the pBAD bacterial his tag expression system from Invitrogen, and am trying to purify the his-tag protein. I have checked a number of methods to lyse the cells to release the protein, but in each case the vast majority of my protein ... biowww http://biowww.net/detail-203.html Has anyone come across a situation where a 6XHis tag has affected the DNA-binding of a DNA-binding protein? (the pH is 8 so unlikely to be +ve charge). I know the folding could be affected. Just wondered if anyone had seen such a phenomenon... ... biowww http://biowww.net/detail-775.html Affinity chromatography purification troubleshooting guide from Roche. Problems: 1. Tagged protein appears in washes, does not bind to affinity resin. 2. Tagged protein remains bound to column, does not elute in Elution Buffer. 3. Extra proteins in elua ... biowww http://biowww.net/detail-1412.html Use of His-tag to coprecipitate a GPCR with protein partners 14.10.2003 10:18 I am working on GPCR-partners interactions, especially on PDZ type interactions. I detected specific interactions by chromatography affinity using a peptide mimicking the C-ter ... biowww http://biowww.net/detail-1304.html Differences in codon usage among organisms can lead to a variety of problems concerning heterologous gene expression. The gcua tools display the codon bias in a graphical manner. Reference: Monitoring dynamic expression of nuclear genes in Chlamydomonas ... biowww