Plant Physiol.
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Plant Physiology 65:924-930 (1980)
© 1980 American Society of Plant Biologists

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Incorporation of [14C]Glucosamine and [14C]Mannose into Glycolipids and Glycoproteins in Cotyledons of Pisum sativum L. 1

Steve K. Browder2 and Leonard Beevers

Department of Botany and Microbiology, University of Oklahoma, Norman, Oklahoma 73019

Developing pea cotyledons incorporate radioactivity in vivo from [14C]glucosamine and [14C]mannose into glycolipids and glycoproteins. Several different lipid components are labeled including neutral, ionicnonacidic, and acidic lipids. The acidic lipids labeled in vivo appear similar to the polyisoprenoid lipid intermediates formed in vitro in pea cotyledons. Radioactivity from [14C]glucosamine and [14C]mannose is also incorporated into glycopeptides. Considerable redistribution of [14C]mannose into other glycosyl components found in endogenous glycoproteins is observed. An N-acetylglucosamine to asparagine glycopeptide linkage has been isolated from [14C]glucosamine-labeled glycoproteins.

2 Present address: Department of Biology, Franklin College, Franklin, Indiana.

1 This research was supported by National Science Foundation Grant PCM 76-05722.






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Copyright © 1980 by the American Society of Plant Biologists