Reduced synthesis of zein in vitro by a high lysine mutant of maize
β Scribed by Richard A. Jones; Brian A. Larkins; C.Y. Tsai
- Book ID
- 118310720
- Publisher
- Elsevier Science
- Year
- 1976
- Tongue
- English
- Weight
- 300 KB
- Volume
- 69
- Category
- Article
- ISSN
- 0006-291X
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Zeins, the major endosperm proteins in maize (Zea mays L.), are deficient in the essential amino acids lysine and tryptophan. Some mutant genes, like opaque-2 (o2) and floury-2 (fl2), reduce the levels of A- and B-zeins, thereby improving maize's nutritional value. Other mutants, such as amylose-ext
The combination of opaque-2 with starch-modified or starch-deficient mutants produced a cumulative and synergistic effect, respectively in regulating zein synthesis. The double mutant, brittle-2 opaque-2, which almost completely prevented the synthesis of Z1 and Z2, had high RNase activity. The poss