This study presents the molecular phylogenetic relationships among Lytorhynchus diadema (Duméril, Bibron & Duméril, 1854) populations in Saudi Arabia relative to from Africa and Asia. analysis was based on mitochondrial 16S 12S rRNA partial gene fragments using Neighbor-joining, Maximum Parsimony, Bayesian methods. The results strongly support monophyly of two concatenated genes separat...

The Trypanosoma brucei exoribonuclease, TbDSS-1, has been implicated in multiple aspects of mitochondrial RNA metabolism. Here, we investigate the role of TbDSS-1 in RNA processing and surveillance by analyzing 12S rRNA processing intermediates in TbDSS-1 RNAi cells. RNA fragments corresponding to leader sequence upstream of 12S rRNA accumulate upon TbDSS-1 depletion. The 5' extremity of 12S rR...

A large-type sexannulate leech species, Orobdella ibukifukuyamai sp. nov. , from Kii-Oshima Island, Japan, is described based on morphologic and molecular data. Phylogenetic analyses using nuclear 18S rRNA, 28S histone H3, mitochondrial cytochrome c oxidase subunit I, tRNA Cys Met 12S Val 16S Leu NADH dehydrogenase 1 markers showed that O. formed a clade with the okanoi Nakano, 2016 yamaneae oc...

Two species of Cantellius from Taiwan were identified from the elephant skin coral, Pachyseris speciosa Dana, 1846. Cantellius sextus was found on the underside of the coral plate and a new species, C. hoegi sp. nov., on the upper surface. The microdistribution indicates the different requirements of the two species. In the present study, both arthropodal and opercular plate characters of these...

introduction: helicobacter pylori (h. pylori), is a bacterium responsible for upper gastrointestinal tract diseases. the 16s rrna is a common h. pylori gene which are usually preferred for diagnosis purpose. the aim of this study was to determine the prevalence and abundance of 16s rrna in fecal samples and also evaluate correlation between the level of 16s rrna and activities of the cytokines,...

Lice are ectoparasitic insects hosted by birds and mammals. Mitochondrial 12S rRNA sequences obtained from lice show considerable length variation and are very difficult to align. We show that the louse 12S rRNA domain III secondary structure displays considerable variation compared to other insects, in both the shape and number of stems and loops. Phylogenetic trees constructed from tree edit ...