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Plant Physiology 61:13-16 (1978)
© 1978 American Society of Plant Biologists

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Articles

Albumin Storage Proteins in the Protein Bodies of Castor Bean 1

Richard J. Youle and Anthony H. C. Huang

Department of Biology, University of South Carolina, Columbia, South Carolina 29208

Of the total protein in the protein bodies of castor bean (Ricinus communis L.), approximately 40% is represented by a group of closely related albumins localized in the matrix of the organelle. This group of albumins has a sedimentation value of 2S and is resolved into several proteins of molecular weight around 12,000 daltons by sodium dodecyl sulfate-acrylamide gel electrophoresis. It has a high content of glutamate/glutamine and undergoes rapid degradation during the early stage of germination. In view of the abundance and ubiquitous occurrence of albumins in various seeds, we suggest that albumins, in addition to globulins, glutelins, and prolamines, are important storage proteins in seeds.

1 This work was supported by National Science Foundation Grant BMS-75-02320 and by National Institutes of Health Biochemical Research Support Grant 1S07 RR 07160.






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ASPB Publications PLANT PHYSIOLOGY® THE PLANT CELL
Copyright © 1978 by the American Society of Plant Biologists