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Identification of tyrosine O-sulfate in proteins by reverse-phase high-performance liquid chromatography: use of base hydrolysis combined with precolumn derivatization using phenyl isothiocyanate

Journal Article · · Anal. Biochem.; (United States)

A procedure has been developed for the analysis of tyrosine O-sulfate in proteins. Samples are subjected to base hydrolysis with Ba(OH)/sub 2/, neutralized with sulfuric acid, and the majority of other amino acids removed by chromatography on Dowex AG 50 x 8. The average recovery of tyrosine O-sulfate from these procedures was 43%. Tyrosine O-sulfate was identified by reverse-phase HPLC as the phenylthiocarbamyl derivative following precolumn derivatization with phenyl isothiocyanate. The method has been applied to bovine fibrinogen giving a tyrosine O-sulfate content ranging from 0.59 to 1.23 mol/mol. These procedures were also shown to be suitable for the analysis of the incorporation of (/sup 35/S)sulfate into tyrosine O-sulfate residues in proteins by intact cells.

Research Organization:
Univ. of Auckland, New Zealand
OSTI ID:
5585241
Journal Information:
Anal. Biochem.; (United States), Journal Name: Anal. Biochem.; (United States) Vol. 154:1; ISSN ANBCA
Country of Publication:
United States
Language:
English

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