>Date: 3-Apr-96 12:26:
> From: treefrog at u.washington.edu (Bryce Chackerian)
>>Does anyone out there have a good protocol for preparing a glycoprotein
>for Mass Spec. by excising a band from an acrylamide gel? Apparently SDS
>is not good when doing MS.
>pls e-mail treefrog at u.washington.edu>Thanks in advance
Pierce Chemical Co. sells a product called "Extracti-Gel D Detergent Removing
Gel (Product #20346 for pre-packed columns) which they say will remove SDS
(and other detergents) by an affinity purification without low non-specific
binding of the protein. I have not used this product, and I have no
connection with the company, but you might call them and ask them about its
application to your use. Their technical service people are generally very
good. Their telephone number is 800-874-3723. You might also be able to
separate your protein from SDS by electroelution through an appropriately
sized dialysis membrane (one that would retain your protein, but let the SDS
migrate to the anode). This would have the added advantage of eluting the
protein from the gel slice and separating it from the SDS in one step.
Again, I have not done this myself. Someone else may be able to comment on
whether these approaches work in practice.