| evolutionary history of 4.5si rna and indication that it is functional. | to date, the small nuclear 4.5si rna has only been studied in the rat (rattus norvegicus). combining pcr and hybridization analyses, we have revealed 4.5si rna homologues sequences in the genomes of four myomorph rodent families (muridae, cricetidae, spalicidae, and rhizomyidae), and not in other myomorph families (dipodidae, zapodidae, geomyidae, and heteromyidae) or sciuromorph and caviomorph rodents. by northern-hybridization, 4.5si rna has been detected in the common rat (r. norvegicus, muri ... | 2002 | 11847561 |
| phylogenetic analysis of entomoparasitic nematodes, potential control agents of flea populations in natural foci of plague. | entomoparasitic nematodes are natural control agents for many insect pests, including fleas that transmit yersinia pestis, a causative agent of plague, in the natural foci of this extremely dangerous zoonosis. we examined the flea samples from the volga-ural natural focus of plague for their infestation with nematodes. among the six flea species feeding on different rodent hosts (citellus pygmaeus, microtus socialis, and allactaga major), the rate of infestation varied from 0 to 21%. the propaga ... | 2014 | 24804197 |