Soybean cultivar J05 was identified to be resistant to the most virulent strain of soybean mosaic virus (SMV) in northeastern China. However, the reaction of J05 to SMV strains in the United States of America is unknown, and genetic information is needed to utilize this germplasm in a breeding program. The objectives of this study were to determine the reaction of J05 to all US strains of SMV (...

The larger of two diuretic hormones of the tobacco hornworm, Manduca sexta, (Mas-DH) is a peptide of 41 residues. It is one of a family of seven currently known insect diuretic hormones that are similar to the corticotropin-releasing factor-urotensin-sauvagine family of peptides. We investigated the possible inactivation of Mas-DH by incubating it in vitro with larval Malpighian tubules (Mt), t...

BACKGROUND Accurate evaluation of gene expression requires normalization relative to the expression of reliable reference genes. Expression levels of "classical" reference genes can differ, however, across experimental conditions. Although quantitative real-time PCR (qRT-PCR) has been used extensively to decipher gene function in the sweetpotato whitefly Bemisia tabaci, a world-wide pest in man...

“Fly-by-night” is a derisive term for a firm that appears to be untrustworthy and/or transient. Previous studies have focused on general fly-by-night firms’ behavior and their interaction with the credit market, while much less has been done to show how they approach government regulation. After a brief explanation of the importance of studying fly-by-night firms and a discussion of some releva...

The paper econometrically investigates the determinants of advertising intensity in the manufacturing industry of São Paulo, Brazil in 1996 taking as reference an extensive survey carried out by Fundação SEADE. The preliminary investigation indicated a substantial degree of endogeneity in structure and performance variables. The instrumental variables estimation also considered instruments refe...

To correlate a prokaryotic endosymbiont in the pea aphid, Acyrthosiphon kondoi, with the endosymbionts in related aphid species as well as with free-living bacteria and subcellular organelles, and to study the mode of its gene expression within aphid cells, we have cloned and characterized the genes encoding ribosomal proteins S3, L16, L29, S17, L14, L24, L5, S14, S8, L6, L18, S5, L30, L15 and ...

We identified and sequenced a segment of Chlamydia trachomatis chromosomal DNA that shows homology to the Escherichia coli spc and distal region of the S10 ribosomal protein (r-protein) operons. Its sequence revealed a high degree of nucleotide and operon context conservation with the E. coli r-protein genes. The C. trachomatis spec operon contains the r-protein genes for L14, L24, L5, S8, L6, ...

Filamentous actinomycetes are commercially widely used as producers of natural products. However, the mycelial life-style of actinomycetes has been a major bottleneck in their commercialization, and screening is difficult due to the poor 5 growth in microtitre plates. We previously demonstrated that the enhanced expression of the cell division activator protein SsgA results in fragmented growth...

Using the atomic structures of the large ribosomal subunit from Haloarcula marismortui and its complexes with two substrate analogs, we establish that the ribosome is a ribozyme and address the catalytic properties of its all-RNA active site. Both substrate analogs are contacted exclusively by conserved ribosomal RNA (rRNA) residues from domain V of 23S rRNA; there are no protein side-chain ato...