Results 211 to 220 of about 154,215 (259)
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Composition of lipids of the grain of opaque-2 maize
Chemistry of Natural Compounds, 1988It has been established that the change in the composition of the total lipids and the fall in the fatty acid content depend on the initial maize genotype. A decrease in the amount of unsaponifiable substances in the grain of mutants is accompanied by qualitative changes in the composition regardless of the nature of the genotype.
A. N. Vinnichenko +5 more
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The origin of lysine-containing proteins in opaque-2 maize endosperm
Plant Molecular Biology, 1993The reduction of zein synthesis in the maize (Zea mays L.) opaque-2 mutant is associated with an increased percentage of lysine in the endosperm protein. When expressed on an endosperm basis, we found that W64A opaque-2 contains 490 micrograms of lysine compared with 350 micrograms in W64A normal.
J E, Habben, A W, Kirleis, B A, Larkins
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Molecular Evolution of the Opaque-2 Gene in Zea mays L.
Journal of Molecular Evolution, 2005The Opaque-2 gene (O2) in maize encodes a transcriptional activator that controls the expression of various genes during kernel development, particularly some of the most abundant endosperm storage protein genes. Compared to its wild relative teosinte, maize has bigger and heavier kernels, with an increased proportion of starch and an altered ...
Henry, Anne-Marie +3 more
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An Opaque-2-Like Transcription Factor from Pearl Millet
Protein & Peptide Letters, 2004Pearl millet (Pennisetum glaucum L.), a species of the Poaceae family, is an important food crop in Africa, Asia and South America. Its nutritional value is due to storage prolamins accumulated in the seeds. In other species of the same family, the expression of the genes coding for storage prolamins is mediated by the regulatory protein opaque-2.
Lucilia Helena, Marcellino +3 more
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High rates of polymorphism and recombination at the Opaque-2 locus in cultivated maize
Molecular and General Genetics MGG, 1997As a first step in the study of the functional consequences of molecular polymorphism at the Opaque-2 locus in maize, 1933 bp of the gene were sequenced in 21 inbred lines representative of the progenitors of cultivated varieties. High levels of polymorphism were found: 109 sites were variable in non-coding regions and 159 in protein-coding regions ...
Henry, Amelia, Damerval, C.
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Genetic instability at the opaque-2 locus of maize
Molecular and General Genetics MGG, 1980A case of genetic variegation discovered at the opaque-2 locus of maize that includes a two-element system with a receptor and regulatory element is described. The somatic mutability depends on the existence of two genetic factors: a responsive allele (with receptor element), o2m(r), and a regulatory element, Bg, that induces mutability of o2m(r).
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Ribonuclease Activity in Normal and Opaque-2 Mutant Endosperm of Maize
Science, 1967Three strains of maize heterozygous for the opaque-2 mutant gene were self-pollinated to produce ears bearing both normal and opaque kernels. The ribonuclease activity of the opaque-2 endosperm was two to more than four times as high as the activity in the normal endosperm.
C M, Wilson, D E, Alexander
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Characterization of the molecular defect in a null allele of the opaque-2 locus of maize
Plant Molecular Biology, 1996The molecular defect in an opaque-2 (o2) mutant, previously characterized as a null allele, has been identified as containing an insertion of the transposable element of the Bergamo (Bg) family. Restriction mapping and partial sequence analysis of the Bg in the o2 null allele indicates that this element is distinct from the previously described Bg as ...
G, Hoschek, K A, Russell, R J, Schmidt
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Structural and functional analysis of an Opaque-2-related gene from sorghum
Plant Molecular Biology, 1994The Opaque-2 (O2) gene from maize encodes a transcriptional activator of the b-ZIP class. We have isolated and characterized a gene from sorghum, related in sequence to the O2 gene from maize. A single copy of the gene is present in sorghum. Both genomic and cDNA sequences of the O2-related sorghum gene were determined.
L, Pirovano +8 more
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Ribonuclease Activity in the Developing Seeds of Normal and Opaque-2 Maize
Science, 1967During development, the ribonuclease activity of maize endosperm homozygous for the opaque-2 gene increased earlier and, after a longer period of exponential increase, was much higher finally than in normal endosperm.
A, Dalby, I I, Davies
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