A method for electrophoretic elution of proteins from polyacrylamide gel slices is described. Eluted proteins were retained by a discontinuous conductivity gradient (M. Otto and M. SnejdΓ‘rkovΓ‘, Anal. Biochem. 111, 111-114 (1981)). The method has been adapted to slices from slab gels and gels that ha
Amino acid composition of proteins eluted from polyacrylamide gels: Background considerations
β Scribed by William E. Brown; Gary C. Howard
- Publisher
- Elsevier Science
- Year
- 1980
- Tongue
- English
- Weight
- 334 KB
- Volume
- 101
- Category
- Article
- ISSN
- 0003-2697
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β¦ Synopsis
It is shown that the contribution of the gel itself to amino acid compositions of proteins eluted from polyacrylamide gels is significant (especially at low protein-to-gel ratios), linearly related to the volume of the gel slices eluted, and, when applied as a correction to amino acid composition data, results in an enhancement of the composition determination.
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A procedure which allows quantitative determination of the amino acid composition of stained proteins separated by sodium dodecyl sulfate (SDS)-gel electrophoresis using ninhydrin is described. The Coomassie-protein-SDS complex extracted from the gel is dialyzed, lyophylized, and subjected to amino