New PDF release: A Practical Guide to Membrane Protein Purification

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 specially 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 offers recommendations in a concise shape, emphasizing the features distinctive to membrane proteins. The publication explains the foundations of the equipment, allowing researchers and scholars new to this quarter to evolve those ideas to their specific wishes. the second one quantity within the sequence, this e-book is an important handbook 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. each one quantity specializes in an issue of principal curiosity to scientists and scholars in biomedical and organic examine. Introductory chapters are by way of transparent, step by step protocols that current rules and perform. those concise manuals are designed for optimum knowing of tools in addition to for useful benchtop use.

  • Provides basic instructions and methods for isolation of membrane proteins
  • Describes designated sensible approaches which were the widest functions, and lowest really good gear needs
  • Gives specific emphasis to new local and denaturing electrophoresis techniques
  • Explains transformations of concepts used for water-soluble proteins

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Additional resources for A Practical Guide to Membrane Protein Purification

Sample text

These differences are thought to be due to the different lipid compositions of the membranes. 1. 8 times the gram amount of Triton). CHAPTER 2 Chromatographic Techniques and Basic Operations 25 a. , removal of water-soluble and peripheral membrane proteins) first in smallscale experiments. PROTEIN IN SUPERNATANT 1. Suspend membranes at twice the desired final protein concentration in water, for example, at 40 mg/ml for the experiment corresponding to Fig. 1. 2. 5 ml) to 1-ml tubes. 3. 2) that contains all components except one (NaCl in this case) and mix.

5 50-100 m M sodium acetate pH 6 - 8 . 5 All buffers also contain 0 . 1 - 1 . 3 M metal ion, plus a neutral detergent. If elution is not effected by pH reduction, but instead by competitive ligand binding (say, by imidazole or histidine), the amine should be present at low concentration in the start buffer as well as in the applied sample. For proteins with unknown binding properties, use neutral phosphate or acetate buffers in pilot experiments. Phosphate and acetate will not interfere with the protein-metal ion interaction, and they allow binding of proteins with low affinity.

In this case the aggregated proteins are pelleted by ultracentrifugation and the differential precipitation process continued using the clear supernatant. Neutral detergents usually do not provide effective differentiation between integral membrane proteins in salting out procedures. Limited success has been obtained only after addition of bile salts to a minimal ratio of 1 g of bile salt per 5 g of neutral detergent (H. Schagger, unpublished results). A productive differential precipitation from a laurylmaltoside/cholate mixture with cholate in excess is described in Chapter 6.

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


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