Resolution and Identification of Proteins, Proteome, Biological Sample, Laboratories, Rapid Analytical Method

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Resolution and identification of proteins

A variety of methods are now available for identification of"' proteins available in a cell. However, they need to be separated from each other before they are identified and their functions are identified.

2D-PAGE. As mentioned above, initially proteome is analysed from a cell extract using 2D-PAGE. However, generally not more than about a thousand (1,000) or a maximum of 1en thousand (10,000) proteins out of a total of up to 1000,000 proteins that may be available in a biological sample, can be resolved by 2D-PAGE. Therefore, only the most abundant proteins can be visualized by this method.

Affinity based purificaion, however, can be used to purify proteins of low abundance for further analysis. Nevertheless, with the help of 2D-PAGE, which was quite reproducible between laboratories, extensive catalogues of 2D-P AGE" spots were prepared and stored as the databases of expressed proteins, without assigning meaning to these spots. However, determining the identity of proteins resolved as 2D-PAGE spots was difficult, due to lack of availability of rapid analytical methods for protein characterization.

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Methods for Annotation of Genome Sequences Annotation By Sequence Search Loss of Function by Mutation Approach Proteomics Research Significance of Proteomics Research Methods of Proteome Analysis Resolution and Identification of Proteins Mass Spectrometry Comparative 2D-gel Approach Protein Chips Approach Analysis of Post Translational Modification of Proteins Protein-Protein Interactions Purification of Protein Complexes Phage Display Yeast Two Hybrid System Functions of all the Ptoteins of Yeast Worked Out