Re: [ccp4bb] MS for verification of protein constructs

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CCP4bb <-- 2007 <-- September 2007 <-- 05 September 2007

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Subject: MS for verification of protein constructs
From: Patrick Loll pat {- dot -} loll {- at -} DREXEL {- dot -} EDU
Date: 2007-09-05

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Subject: Re: MS for verification of protein constructs
From: Jacob Keller j-keller2 {- at -} MD {- dot -} NORTHWESTERN {- dot -} EDU
Date: 2007-09-05

I second Dr. Loll's question, and would like to be CC'd in whatever MS tips, including
service-providers, are sent. I have been having a bit of a debacle with a certain MS service provider.

Jacob Keller

==============Original message text===============
On Wed, 05 Sep 2007 11:41:52 am CDT Patrick Loll wrote:

I wonder if anyone would care to share experiences/ideas/biases that
relate to the use of mass spectrometry to verify the identity of
protein constructs used for crystallization. Our experience with
different MS facilities has been checquered.

Specifically:

What's the current thinking on the best approach to get masses for
intact proteins of moderate size (say, 40 kD)? ESI-TOF?
What kind of resolution should one hope to obtain in such cases
(10E-04?)

Any suggestions as to good facilities offering fee for service MS
characterization are welcome (but should be shared off line, I think;
continental US only).

Thanks,

Pat
------------------------------------------------------------------------
---------------
Patrick J. Loll, Ph. D. (215) 762-7706
Associate Professor FAX: (215) 762-4452
Department of Biochemistry & Molecular Biology
Director, Biochemistry Graduate Program
Drexel University College of Medicine
Room 10-102 New College Building
245 N. 15th St., Mailstop 497
Philadelphia, PA 19102-1192 USA

pat.loll@drexel.edu

===========End of original message text===========

***********************************
Jacob Keller
Northwestern University
6541 N. Francisco #3
Chicago IL 60645
(847)491-2438
j-keller2@northwestern.edu
***********************************

CCP4bb navigation

CCP4bb <-- 2007 <-- September 2007 <-- 05 September 2007

Previous message:
Subject: MS for verification of protein constructs
From: Patrick Loll pat {- dot -} loll {- at -} DREXEL {- dot -} EDU
Date: 2007-09-05

Next message:
Subject: few organophophates coordiantes
From: U Sam us_x {- at -} HOTMAIL {- dot -} COM
Date: 2007-09-05