Glysosylation and western blot

[Kai Lehmann]

"Christophe GUENIN" <christophe.guenin at hol.fr> wrote:

>I would like to know when a protein have a site of glycosylation.
>Does anybody  know if its migration in gel SDS is more quickly ?
>
>My protein have a molecular weight of 51 kDa.
>With a gel she has a molecular weight of 40 kDa.
>
>Does anybody know  the phenomenon ?
>Thanks to give me explanation and  bibliographic references.
>
>Sophie
>Paris France.
>
>christophe.guenin at hol.fr

I am working with glycosylated Albumin and the glycosylation increases
the MW in SDS-PAGE. It is commonly thought that this behaviour is due
to interaction of the glycosylated protein with the gelmatrix rather
than caused by a real increase in MW. If your protein seems to have a
lower MW after glycosylation, it maybe has changed its confirmation. 
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    Kai Lehmann         stu30142 at mail.uni-kiel.d400.de