the structural requirements for the inhibitor activity of various furan carboxanilide derivatives against succinate dehydrogenase complex (sdc) activity in mitochondria of either wild or mutant strains of ustilago maydis were investigated with the aid of hansch qsar analysis. it has been found that the inhibitor activity against both types of enzymes is best related to the ??? or ??m of the sub...

Heterotrophic arsenite oxidation by Hydrogenophaga sp. str. NT-14 is coupled to the reduction of oxygen and appears to yield energy for growth. Purification and partial characterization of the arsenite oxidase revealed that it (1). contains two heterologous subunits, AroA (86 kDa) and AroB (16 kDa), (2). has a native molecular mass of 306 kDa suggesting an alpha(3)beta(3) configuration, and (3)...

DdrA protein binds to and protects 3' DNA ends and is essential for preserving the genome integrity of Deinococcus radiodurans following treatment by gamma radiation in an environment lacking nutrients. Limited proteolysis was used to identify a stable and functional protein core, designated DdrA157, consisting of the first 157 residues of the protein. In vitro, the biochemical differences betw...

a one kb portion of the rpos gene from flexibacter chinensis was isolated by pcr, sequenced and compared to the rpos gene of a variety of other organisms. the gene was found to be 98% similar to previously sequenced genes. mutation of the rpos gene with tri-parental mating produced strain jr101 and the growth rate of the mutant was compared with that of the wild-type. the mutant grew slower, an...

Drought stress is one of the important factors that restrict crop production in the world. This study was conducted to investigate defense gene expression in response to drought stress, and also to evaluate the drought tolerance and its mechanism in rice cultivars based on randomized complete block design in two separate environments (drought stress and non-stress). The rice cultivars used incl...