# Browse by Subject "Biology, Molecular"

• (1994)
In biological systems, DNA/RNA-protein interactions as well as drug-DNA interactions play important roles in genetic processes. A fundamental understanding of these processes requires a detailed structural knowledge of ...

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• (1994)
A hybrid cytochrome P450, C2MstC1, with 306 amino terminal P450 2C2 amino acids and 184 carboxy-terminal P450 2C1 amino acids acquires a novel progesterone C-21 hydroxylase activity which is absent in the parent enzymes. ...

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• (1993)
Numerous studies have demonstrated that the phytohormone abscisic acid (ABA) plays an important role in many processes during seed development. ABA prevents precocious germination during seed development and induces specific ...

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• (1990)
The Ti plasmid of Agrobacterium tumefaciens T37 was reconstructed in several different plasmids. The performance of the border repeats alone and in conjunction with overdrive and a left border inhibitory region was measured ...

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• (1992)
This study describes two maturation (Mat) genes which share some structural similarities with a special group of genes, whose expression can be induced by water stress and also by exogenous abscisic acid (ABA) application. ...

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• (1994)
Signal transduction in plant cells is in part mediated by fluctuations in cytosolic calcium levels. These fluctuations are found to alter the activity of cellular proteins that are sensitive to the calcium levels. The exact ...

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• (1996)
Organ specificity is an important criterion to be considered for the expression of foreign genes in plants. For crop improvement by genetic engineering it is critical to introduce genes in specific organs that can be ...

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• (1990)
Chloroplast genes in higher plants frequently synthesize multiple RNA transcripts. Part of this heterogeneity in RNA is due to posttranscriptional RNA processing events; however, some chloroplast genes such as the $\beta$ ...

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• (1991)
The expression of the threonine operon of Escherichia coli is controlled by attenuation. An open translational reading frame in the leader region preceding the structural genes contains 21 codons with eight threonine and ...

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• (2009)
Methanogens are strictly anaerobic Archaea that derive their energy for growth by reducing a limited number of substrates to methane. Methanosarcina spp. utilize the methylotrophic pathway to grow on methanol, methylamines ...

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• (1996)
In the first part of this work we provide evidence indicating that under standard cell culture conditions unliganded estrogen receptor (ER) is unable to activate transcription. Studies of Chinese Hamster Ovary cells which ...

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• (1986)
Two EcoR I restriction fragments containing PTH gene sequences were isolated from a partial bovine library prepared using EcoR I cleaved high molecular weight bovine DNA and lambda phage charon 30 as a cloning vector. ...

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• (1996)
The genes encoding the enzymes for de novo pyrimidine biosynthesis in the gram-positive microorganism Bacillus subtilis were previously shown to be clustered at 139 min on its chromosome, transcribed from a single promoter ...

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• (1994)
The induction of the Xenopus estrogen receptor mRNA by its ligand, estradiol-17$\beta$ (E$\sb2$), results in the establishment of a permanent autoregulatory loop. In order to identify the element(s) responsible for the ...

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• (1989)
A single, transient dose of estradiol-17$\beta$ is sufficient to elicit the permanent induction of hepatic estrogen receptor mRNA, which is induced 18-fold, from 0.13 molecules/cell to 2.4 molecules/cell, and then remains ...

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• (1994)
Secretory trafficking in eukaryotic cells occurs via membrane-enclosed organelles and vesicular intermediates which deliver proteins and lipids to their cellular destinations. Throughout this process, the unique nature of ...

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• (1990)
Protein translocation across the endoplasmic reticulum of higher cells is dependent on a ribonucleoprotein complex known as signal recognition particle (SRP). SRP is composed of six polypeptides and one molecule of 7SL ...

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• (1995)
The integration host factor (IHF) of Escherichia coli is a small, sequence-specific DNA-binding protein. The specific and nonspecific DNA binding constants were determined by gel mobility shift assays. The binding constant ...

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• (1990)
I have examined the small RNA profile of the fission yeast Schizosaccharomyces pombe. In vivo labeling followed by two dimensional gel electrophoresis of S. pombe RNA demonstrates the presence of four prominent species in ...

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• (1993)
Bacterial chemotaxis may be considered the archetype for the behavioral response by organisms to environmental stimuli. The movement of bacteria toward various chemical substances depends upon the ability of the organism ...

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