## Abstract Wool intermediate filament proteins (IFP) are a subclass of the cytokeratins, a group of structural proteins which form intermediate filaments in many cell types. Postβtranslational modifications, such as phosphorylation, play an important role in the control of intermediate filament as
Two-dimensional gel electrophoresis of wool intermediate filament proteins
β Scribed by Louise N. Paton; Juliet A. Gerrard; Warren G. Bryson
- Publisher
- Elsevier
- Year
- 2008
- Tongue
- English
- Weight
- 661 KB
- Volume
- 71
- Category
- Article
- ISSN
- 1874-3919
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β¦ Synopsis
Two-dimensional polyacrylamide gel electrophoresis (2D-PAGE) methods have been used to provide high-resolution separation of wool intermediate filament proteins (IFPs). An improved method of extraction was developed based on a previously published method.
The improved method for extraction eliminates the use of dialysis and freeze-drying between the extraction and rehydration steps, allowing the extraction and rehydration for the first dimension gel to be achieved in one day. Improvements to the method for maintaining reducing conditions and chaotrope constitution, combined with low %T polyacrylamide gels, allowed the high-resolution separation of the two keratin IFP families and their individual family members. The IFPs were separated to produce a clearly defined spot pattern of higher intensity, with numerous minor spots not previously observed, and a marked improvement in the vertical resolution. Further work to analyse the composition of each of the protein spots has been made much easier by being able to separate the IFPs into discrete spots.
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A specially designed apparatus and conditions are described for the rapid analysis of ribosomal proteins by two-dimensional gel electrophoresis on a micro scale. The resolution of proteins in electropherograms is comparable to that obtained with other systems, but because of miniaturization, only 0.
Genomic studies have shown that there are four abundant type I and type II intermediate filament proteins (IFPs) in wool. When separated using 2D-PAGE, the type I IFPs separated into four clearly defined major rows. The type II IFPs separated into two distinct staggered rows. The large number of spo
Intermediate filament (IF) proteins, in contrast to microtubules and microfilaments, are preferentially expressed in higher eukaryotes, are relatively insoluble, and are made up of a large and diverse family of proteins (reviewed in [1][2][3][4][5]). Aside from the nuclear lamins, members of the cyt
## Abstract Electrophoretic techniques, and especially twoβdimensional gel electrophoresis (2βDE), have provided an indispensable set of tools for the separation of complex protein mixtures as well as for the identification of proteinβprotein interactions. Nevertheless, after its introduction more