1. Arkansas Children's Nutrition Center, Agricultural Research Service, U.S. Department of Agriculture, 1212 Marshall Street, Little Rock, Arkansas 72202, Department of Physiology & Biophysics, University of Arkansas for Medical Sciences, 4301 West Markham Street, Little Rock, Arkansas 72205, and Cereal Quality Lab, Texas A&M University, 2474 TAMU, College Station, Texas 77843-2474