Sulfation of glycoprotein

[kzhao at BIOVX1.BIOLOGY.UCLA.EDU]

Dear Dr. Spagnol:

I recently finished a project for the analysis of glycoforms on a recombinant 
lysosomal enzyme, alph-L-iduronidase, using lectin binding, HPLC, and MALDI-
TOFMS (mass spectrometry) prior to and after endo-glycosidase digestion.  With
this protocol, I was able to detect phosphate on high mannose (Man-6-P).  The 
phosphate was confirmed by alkaline phosphatase cleavage.  I believe SO4, which
happens to have identical mass as PO4 (~80 Da), could also be identified this 
way (as well as any other methods available).







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* Ke-Wei Zhao, Ph.D.                     Phone: (310)825-8722                  *
* Department of Biological Chemistry     Fax: (310)206-5272                    *
* UCLA School of Medicine, CHS 33-257    e-mail: kzhao at biovx1.biology.ucla.edu *
* Los Angeles, CA 90095-1737                                                   *
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