Download e-book for iPad: A Practical Guide to Membrane Protein Purification by Gebhard von Jagow, Arnold Revzin

By Gebhard von Jagow, Arnold Revzin

ISBN-10: 0080571727

ISBN-13: 9780080571720

ISBN-10: 0127255508

ISBN-13: 9780127255507

A useful consultant to Membrane Protein Purification is written in particular for researchers who've a few familarity with separation of water-soluble proteins, yet who will not be conscious of the pitfalls they face with membrane proteins. This advisor provides strategies in a concise shape, emphasizing the points designated to membrane proteins. The ebook explains the rules of the tools, allowing researchers and scholars new to this region to conform those thoughts to their specific wishes. the second one quantity within the sequence, this booklet is a necessary guide for investigations of constitution and serve as of local membrane proteins, in addition to for purification of those proteins for immunization and protein sequencing.

Separation, Detection, and Characterization of organic Macromolecules is a brand new sequence of laboratory courses. every one quantity makes a speciality of a subject matter of imperative curiosity to scientists and scholars in biomedical and organic study. Introductory chapters are via transparent, step by step protocols that current rules and perform. those concise manuals are designed for optimum realizing of equipment in addition to for useful benchtop use.

  • Provides basic instructions and techniques for isolation of membrane proteins
  • Describes certain useful approaches which have been the widest purposes, and lowest really good apparatus needs
  • Gives distinct emphasis to new local and denaturing electrophoresis techniques
  • Explains differences of strategies used for water-soluble proteins

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Extra resources for A Practical Guide to Membrane Protein Purification

Sample text

The phase separation properties of several neutral and ionic detergents as a function of salt concentration, and their use for fractionation of membrane proteins, are described by Parish et al (1986) and Fricke (1993). 3. Differential Precipitation Separation of individual membrane proteins can often be effectively achieved by differential precipitation following protein solubilization by bile salts, by gradually raising the ammonium sulfate or ammonium acetate concentration (see Hatefi, 1978; Deutscher, 1990).

High protein concentration (40 mg/ml), high salt concentration (500 m M NaCl), low phosphate (10 m M ) , and addition of sucrose (250 m M ) so that the Triton concentration can be low]. 2. Initial Steps in Purification of Membrane Proteins a. 5 ml of hydroxylapatite in Pasteur pipettes plugged with small swabs of cotton wool. b. 5% Triton X-100; equilibrate additional columns with similar buffers containing more phosphate (50, 100, 150 m M ) . c. Apply a protein sample to the first column, containing 10 m M phosphate (not more than 2 mg protein per ml of hydroxylapatite).

5%), membrane proteins may be delipidated and denatured when several column volumes of elution buffer are applied before elution occurs. " The pH that results in elution is close to the pi of the protein. Proteins in the flow-through fractions are not concentrated; however, the eluate may be applied to another column equilibrated with a starting buffer at higher pH. b. Adjusting Conditions for Optimal Chromatofocusing After the pilot experiments an approximate value of the isoelectric point is known, and it is possible to decide whether a switch to PBE 118 might be advantageous or if the pH limits should be changed in order to obtain a narrow, high-resolution pH gradient.

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A Practical Guide to Membrane Protein Purification by Gebhard von Jagow, Arnold Revzin

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