title: Nutritional assessment of transgenic lysine-rich maize compared with conventional quality protein maize.
abstract: BACKGROUND
  The gene sb401 encoding a lysine-rich protein has been successfully integrated into the genome of maize (Zea mays), its expression showing as increased levels of lysine and total protein in maize seeds. As part of a nutritional assessment of transgenic maize, nutritional composition, especially unintended changes in key nutrients such as proximates, amino acids, minerals and vitamins as well as in antinutrient (phytate phosphorus), and protein nutritional quality were compared between transgenic maize (inbred line 642 and hybrid line Y642) and conventional quality protein maize (QPM) Nongda 108.
  
  
  RESULTS
  The contents of total protein, lysine, some other amino acids, several minerals and vitamin B₂ in transgenic inbred line 642 and hybrid line Y642 were significantly higher than those in conventional QPM. Water-soluble protein and G2-glutelin were significantly promoted in transgenic maize Y642.
  
  
  CONCLUSIONS
  Insertion of the lysine-rich sb401 gene increased the total protein and lysine content of transgenic maize varieties, leading to an improved amino acid score and therefore an improvement in the nutritive value of maize.
authors: China Certification & Accreditation Institute, Certification and Accreditation Administration of People's Republic of China, Beijing, China.
authors: Maozhi
authors: M
authors: Tang
authors: Xiaoyun
authors: X
authors: He
authors: Yunbo
authors: Y
authors: Luo
authors: Liyan
authors: L
authors: Ma
authors: Xiaoge
authors: X
authors: Tang
authors: Kunlun
authors: K
authors: Huang
mesh_terms: D002678:Chimera / Q000378:metabolism; D002681:China; D018556:Crops, Agricultural / Q000737:chemistry* / Q000235:genetics; D004044:Dietary Proteins / Q000032:analysis*; D017343:Genes, Plant; D005983:Glutens / Q000032:analysis / Q000737:chemistry; D006801:Humans; D008239:Lysine / Q000032:analysis*; D009753:Nutritive Value; D010833:Phytic Acid / Q000032:analysis; D010940:Plant Proteins / Q000032:analysis* / Q000737:chemistry / Q000235:genetics; D030821:Plants, Genetically Modified / Q000737:chemistry* / Q000235:genetics; D012256:Riboflavin / Q000032:analysis; D012639:Seeds / Q000737:chemistry*; D032322:Solanum / Q000235:genetics; D012995:Solubility; D014131:Trace Elements / Q000032:analysis; D003313:Zea mays / Q000737:chemistry* / Q000235:genetics
chemical_list: D004044:Dietary Proteins; D010940:Plant Proteins; D014131:Trace Elements; D010833:Phytic Acid; D005983:Glutens; C067781:Zc2 protein, Zea mays; D008239:Lysine; D012256:Riboflavin