Frame Joints
Mostrando 13-21 de 21 artigos, teses e dissertações.
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13. Intragenic variation by site-specific recombination in the cryptic plasmid of Neisseria gonorrhoeae.
Cryptic plasmid DNA of Neisseria gonorrhoeae was found integrated into the gonococcal chromosome in both plasmid-bearing strains and plasmid-free strains. At several chromosomal locations only segments of the plasmid were found. However, in at least two strains an intact copy of the plasmid seemed to be present with the joints between the plasmid and the chr
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14. Homologous genetic recombination as an intrinsic dynamic property of a DNA structure induced by RecA/Rad51-family proteins: A possible advantage of DNA over RNA as genomic material
Heteroduplex joints are general intermediates of homologous genetic recombination in DNA genomes. A heteroduplex joint is formed between a single-stranded region (or tail), derived from a cleaved parental double-stranded DNA, and homologous regions in another parental double-stranded DNA, in a reaction mediated by the RecA/Rad51-family of proteins. In this r
The National Academy of Sciences.
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15. Protein fusions of beta-galactosidase to the ferrichrome-iron receptor of Escherichia coli K-12.
The fusion-generating phage lambda plac Mu1 was used to produce fusions of lacZ to fhuA, the gene encoding the ferrichrome-iron receptor (FhuA protein) in the outer membrane of Escherichia coli K-12. Fusions to the fhuA gene in a delta (lac) strain were selected by their resistance to bacteriophage phi 80 vir. Ten independent (fhuA'-'lacZ) fusions were all L
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16. Export of FepA::PhoA fusion proteins to the outer membrane of Escherichia coli K-12.
A library of fepA::phoA gene fusions was generated in order to study the structure and secretion of the Escherichia coli K-12 ferric enterobactin receptor, FepA. All of the fusion proteins contained various lengths of the amino-terminal portion of FepA fused in frame to the catalytic portion of bacterial alkaline phosphatase. Localization of FepA::PhoA fusio
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17. Utilisation of joint movement range in arboreal primates compared with human subjects: an evolutionary frame for primary osteoarthritis.
OBJECTIVE--To determine whether an arboreal lifestyle required full use of movement ranges underutilised in nine joint groups in humans, because under-utilisation of available movement range may be associated with susceptibility to primary osteoarthritis. METHODS--Utilisation of the nine joint groups was studied in two species of primate exercising in a simu
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18. Topological analysis of the Rhodobacter capsulatus PucC protein and effects of C-terminal deletions on light-harvesting complex II.
A theoretical model for the cytoplasmic membrane topology of the Rhodobacter capsulatus PucC protein was derived and tested experimentally with pucC'::pho'A gene fusions. The alkaline phosphatase (AP) activities of selected fusions were assayed, and the resultant pattern of high and low activity was compared with that of the theoretical model. High AP activi
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19. Tylosin Resistance in Arcanobacterium pyogenes Is Encoded by an Erm X Determinant
Arcanobacterium pyogenes, a commensal on the mucous membranes of many economically important animal species, is also a pathogen, causing abscesses of the skin, joints, and visceral organs as well as mastitis and abortion. In food animals, A. pyogenes is exposed to antimicrobial agents used for growth promotion, prophylaxis, and therapy, notably tylosin, a ma
American Society for Microbiology.
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20. High-frequency deletional rearrangement of immunoglobulin kappa gene segments introduced into a pre-B-cell line.
We describe an immunoglobulin gene recombination indicator in which a specific rearrangement via deletion results in the acquisition of a dominant phenotype. The indicator consists of the Escherichia coli xanthine/guanine phosphoribosyltransferase (gpt) gene, whose translation is prevented by the presence of an upstream initiation codon out of frame with res
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21. Essential site for growth rate-dependent regulation within the Escherichia coli gnd structural gene.
Expression of gnd of Escherichia coli, which encodes the hexose monophosphate shunt enzyme, 6-phosphogluconate dehydrogenase (6PGD; EC 1.1.1.44), is subject to growth rate-dependent regulation: the level of the enzyme is directly proportional to growth rate under a variety of growth conditions. Previous results obtained with strains carrying transcriptional