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The Composition of Glyphosate-Tolerant Soybean Seeds Is Equivalent to that of Conventional Soybeans^1,2,

Monsanto Company, St. Louis, MO 63198 ^* Ralston Analytical Laboratories, St. Louis, MO 63164

One important aspect of the safety assessment of genetically engineered crops destined for food and feed uses is the characterization of the consumed portion of the crop. One crop currently under development, glyphosate-tolerant soybeans (GTS), was modified by the addition of a glyphosate-tolerance gene to a commercial soybean cultivar. The composition of seeds and selected processing fractions from two GTS lines, designated 40-3-2 and 61-67-1, was compared with that of the parental soybean cultivar, A5403. Nutrients measured in the soybean seeds included macronutrients by proximate analyses (protein, fat, fiber, ash, carbohydrates), amino acids and fatty acids. Antinutrients measured in either the seed or toasted meal were trypsin inhibitor, lectins, isoflavones, stachyose, raffinose and phytate. Proximate analyses were also performed on batches of defatted toasted meal, defatted nontoasted meal, protein isolate, and protein concentrate prepared from GTS and control soybean seeds. In addition, refined, bleached, deodorized oil was made, along with crude soybean lecithin, from GTS and control soybeans. The analytical results demonstrated that the GTS lines are equivalent to the parental, conventional soybean cultivar.

KEY WORDS: • glyphosate-tolerant soybeans • soybeans • composition • nutrient • antinutrient

¹ This article has undergone the standard peer-review process of The Journal of Nutrition.

² The costs of publication of this article were defrayed in part by the payment of page charges. This article must therefore be hereby marked "advertisement" in accordance with 18 USC section 1734 solely to indicate this fact.

³ To whom correspondence should be addressed: Monsanto BB3B, 700 Chesterfield Parkway North, St. Louis, MO 63198. E-mail: srpadg@ccmail.monsanto.com.

Manuscript received 7 February 1995. Revision accepted 27 November 1995.

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