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      N-Glycosylated Variants of Growth Hormone in Human Pituitary Extracts

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          Abstract

          This study was designed to investigate the existence, in human pituitary extracts, of growth hormone (GH) variants not encoded by the hGH-N gene. Using anion exchange-fast protein liquid chromatography followed by SDS-PAGE, we isolated several basic forms of pituitary GH. Incubation of these basic forms with endoglycosidase F/N-glycosidase F revealed that two of them (about 34 and 12 kD) were N-glycosylated. In contrast, no changes were found when samples were incubated with the O-linked glycosylation-specific O-glycosidase. Since the GH-N molecule lacks consensus sequences for N-linked glycosylation, our findings suggest that GH genes other than hGH-N are expressed in the human pituitary gland.

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          Author and article information

          Journal
          HRE
          Horm Res Paediatr
          10.1159/issn.1663-2818
          Hormone Research in Paediatrics
          S. Karger AG
          1663-2818
          1663-2826
          2000
          2000
          11 August 2000
          : 53
          : 1
          : 40-45
          Affiliations
          Departamento de Fisiología, Facultad de Medicina, Santiago de Compostela, España
          Article
          23512 Horm Res 2000;53:40–45
          10.1159/000023512
          10965220
          © 2000 S. Karger AG, Basel

          Copyright: All rights reserved. No part of this publication may be translated into other languages, reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, microcopying, or by any information storage and retrieval system, without permission in writing from the publisher. Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug. Disclaimer: The statements, opinions and data contained in this publication are solely those of the individual authors and contributors and not of the publishers and the editor(s). The appearance of advertisements or/and product references in the publication is not a warranty, endorsement, or approval of the products or services advertised or of their effectiveness, quality or safety. The publisher and the editor(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements.

          Page count
          Figures: 4, References: 19, Pages: 6
          Categories
          Original Paper

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