Re: MS and peptide MWs

Carolyn Moomaw (CMOOMA@MEDNET.SWMED.EDU)
Thu, 20 Aug 1998 15:34:38 -0500

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Dear Group, Recently, my colleague ran a proteolytic digest of a 65K
protein, by positive ESI on a Micromass Quattro II instrument. He found
several digest fragments with mass differences of 183 Da(i.e. 8596,
8779, 8962 and 23569, 23753). The fragment of 8596 Da was expected.
Does anyone know what a 183 Da difference might be? Thanks for your
attention!
Carolyn R. Moomaw
Howard Hughes Medical Institute
Univ. of Texas Southwestern Medical Center
5323 Harry Hines Blvd.
Dallas, TX 75235-9050
Voice: (214)648-5031
Fax: (214)648-9477
<cmooma@mednet.swmed.edu>

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