Madiyalakan R, Yazawa S, Abbas SA, Barlow JJ, Matta KL. Use of N-acetyl-2'-O-methyllactosamine as a specific acceptor for the determination of alpha-L-(1----3)-fucosyltransferase in human serum.
Anal Biochem 1986;
152:22-8. [PMID:
3954042 DOI:
10.1016/0003-2697(86)90112-0]
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Abstract
A synthetic substrate, N-acetyl-2'-O-methyllactosamine, was employed as a specific acceptor for alpha-L-(1----3)-fucosyltransferase from human serum. The fucosyl linkage of the product from this substrate was characterized by hydrolysis with a specific alpha-L-(1----3)/(1----4)-fucosidase. Using this acceptor, the pH optimum for the serum alpha-L-(1----3)-fucosyltransferase was 6.5. The enzyme was activated by Mn2+ or Mg2+ ions and was inhibited by EDTA. The apparent Km for this enzyme using N-acetyl-2'-O-methyllactosamine was 20.4 mM and Vmax was 5.6 pmol/h/ml serum.
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