Citations to this article

Factor VIII/von Willebrand factor protein. Galactose a cryptic determinant of von Willebrand factor activity.
H R Gralnick
H R Gralnick
Published August 1, 1978
Citation Information: J Clin Invest. 1978;62(2):496-499. https://doi.org/10.1172/JCI109152.
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Research Article

Factor VIII/von Willebrand factor protein. Galactose a cryptic determinant of von Willebrand factor activity.

Abstract

The normal Factor VIII/von Willebrand factor protein has the ability to agglutinate or aggregate normal platelets in the presence of ristocetin (von Willebrand factor activity). Removal of greater than 95% of the sialic acid from this protein by neuraminidase did not affect the von Willebrand factor or procoagulant activity. However, oxidation of the penultimate galactose of the asialo Factor VIII/von Willebrand factor protein with galactose oxidase resulted in a progressive loss of von Willebrand factor activity with no effect on procoagulant activity. Reduction of the 6-aldehydo intermediate by potassium borohydride caused full regeneration of von Willebrand factor activity. These studies confirm the identification of the intact penultimate galactose moiety as a critical determinant of von Willebrand factor activity.

Authors

H R Gralnick

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Citations to this article (33)

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Role of carbohydrate in multimeric structure of factor VIII/von Willebrand factor protein
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