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Characterization of a human seminal plasma glycosaminoglycan-bearing polypeptide.


ABSTRACT: A glycosaminoglycan-bearing polypeptide (S.GP), present in human seminal plasma, was purified to homogeneity by a combination of CsCl density-gradient centrifugation, f.p.l.c. ion-exchange chromatography on a Mono Q HR column and Superose 6 gel filtration. The observed polydispersity of S.GP was attributed to the heterogeneity of its glycosaminoglycan content. Enzymic deglycosylation experiments and N-terminal amino-acid sequence determination indicate that it consists of a polypeptide (apparent molecular mass approx. 18 kDa) bearing both chondroitin and heparan sulphate chains. Evidence is given that S.GP contains a glycosaminoglycan-linkage domain of a so far uncharacterized gene product, proteolytically processed in the genital tract.

SUBMITTER: Bonnet F 

PROVIDER: S-EPMC1132047 | biostudies-other | 1992 Dec

REPOSITORIES: biostudies-other

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