| identification, cloning and expression of pseudomonas aeruginosa ps-x putative urate oxidase gene in escherichia coli. | in a previous study we reported for the first time the isolation and characterization ofurate oxidase enzyme from pseudomonas aeruginosa. in this work we isolated and cloned a 1.350 kilobase dna fragment that encode a putative urate oxidase gene from the genomic library of p. aeruginosa ps-x. the nucleotide sequence of the cloned dna insert revealed an open reading frame that encodes a protein of a molecular weight of 54.0 kda. the cloned dna fragment showed an uricolytic activity when expressed ... | 2004 | 15790071 |
| functional and evolutionary analysis of the genome of an obligate fungal symbiont. | nutritional symbionts of insects include some of the most bizarre genomes studied to date, with extremely reduced size, biased base composition, and limited metabolic abilities. a monophyletic group of aphids within the subfamily cerataphidinae have lost the bacterial symbiont common to all other aphididae (buchnera aphidicola), which have been replaced by a eukaryotic one, the yeast-like symbiont (yls). as symbionts are expected to experience reduced effective population size (ne) and largely c ... | 2013 | 23563967 |
| a closer look at intraspecific variation of cerataphis brasiliensis (hempel) (hemiptera: hormaphididae). | the aim of our study was to characterize cerataphis brasiliensis hempel, an aphid of native palm tree of tropical savannas (cerrado), and to record intraspecific variation. we found two parthenogenetic forms of apterous viviparae females of c. brasiliensis. we differentiate the two forms through measurable and qualitative characters: (i) length of cephalic horns, (ii) number of antennal segments, (iii) presence or absence of wax glands, (iv) location of siphunculi. | 2008 | 18506291 |