Plant Physiol. Journal of Pharmacology and Experimental Therapeutics
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Plant Physiology 68:180-186 (1981)
© 1981 American Society of Plant Biologists

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Developmental Biochemistry of Cottonseed Embryogenesis and Germination 1

XII. PURIFICATION AND PROPERTIES OF PRINCIPAL STORAGE PROTEINS

Leon Dure, III and Caryl Chlan

Department of Biochemistry, University of Georgia, Athens, Georgia 30602

The two principal storage proteins of the cottonseed have been purified and partially characterized. They have apparent molecular weights of 52,000 and 48,000 and are both comprised of sets of isoelectric isomers. Both sets have nearly identical solubility properties, ultraviolet absorption spectra, and contain similar proportions of amino acid residues. Furthermore, both sets share antigenic determinants suggesting their origin from a common ancestral gene. However, only the 52,000 set appears to be glycosylated.

1 Supported by funds from the National Science Foundation, Department of Energy, and Cotton, Inc.




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