Corn amino acid imbalance and the role of leucine excess.
A study was conducted using two experimental models with weanling rats of the Wistar strain fed isocaloric diets containing 7% protein, Model I: two genetic varieties of maize were used; common corn (CC) or opaque-2-corn (M); and Model II: casein, 7% protein used without nicotinic acid in the diet in order to enhance the tryptophan limiting conditions like in the CC diet of Model I. PER, nitrogen balance, urinary urea and hepatic fat were determined. The results suggest that the imbalance of CC protein is related to lysine and tryptophan limitation, although the leucine excess content also plays an important role.
D000596:Amino Acids / Q000378:metabolism; D000818:Animals; D001835:Body Weight; D004032:Diet; D004044:Dietary Proteins / Q000008:administration & dosage*; D005260:Female; D007930:Leucine / Q000378:metabolism*; D008297:Male; D009584:Nitrogen / Q000378:metabolism; D009753:Nutritive Value; D010940:Plant Proteins; D051381:Rats; D011919:Rats, Inbred Strains; D014508:Urea / Q000378:metabolism; D003313:Zea mays
D000596:Amino Acids; D004044:Dietary Proteins; D010940:Plant Proteins; D014508:Urea; D007930:Leucine; D009584:Nitrogen