it is important to know how ethanol has commonly been produced from corn. Corn grain is converted to ethanol in either a “dry-grind” or “wet-mill” process. In dry-grind operations, liquefied corn starch is produced by heating corn meal with water and enzymes. A second enzyme converts the liquefied starch to sugars, which are fermented by yeast into ethanol and carbon dioxide. Wet milling operations separate the fiber and germ from the endosperm, which contains most of the starch and approximately seventy percent of the corn kernel. The starch portion is fermented into ethanol, while the fiber, protein, and oil residues become a nutrient-rich animal feed called “distillers grains