Skip to main content
Contribution to Book
Selection of methionine-enriched soybean seeds
Sulfur transport and assimilation in plants
  • John Imsade, Iowa State University
  • M. Paul Scott, United States Department of Agriculture
Document Type
Book Chapter
Publication Version
Published Version
Publication Date
Protein accounts for approximately 40 % of the dry weight of a soybean seed; how­ ever, soy protein is deficient in both cysteine and methionine. To overcome this sulfur deficiency, animal feeders supplement soy protein rations with costly methio­ nine, which is more stable than cysteine. To alleviate the need for methionine supplementation, we mutagenized seeds and selected genetic soybean lines, the protein of which is enriched approximately 20 % for both cysteine and methionine. Animal rations prepared from these genetic lines should not require methionine supplemen­tation.

This is a chapter from J. Imsande and M.P. Scott (2003) Selection of methionine-enriched soybean seeds. pp. 239-241. In: Sulfur transport and assimilation in plants, J.-C. Davidian, D. Grill, L. J. De Kok, I. Stulen, M. J. Hawkesford, E. Schnug and H. Renneberg, Eds., Backhuys, Leiden, The Netherlands.

Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.
File Format
Citation Information
John Imsade and M. Paul Scott. "Selection of methionine-enriched soybean seeds" Sulfur transport and assimilation in plants (2003) p. 239 - 241
Available at: