Group I introns are mobile, self-splicing genetic elements found principally in organellar genomes and nuclear rRNA genes. The only group I intron known from mitochondrial genomes of vascular plants is located in the cox1 gene of Peperomia, where it is thought to have been recently acquired by lateral transfer from a fungal donor. Southern-blot surveys of 335 diverse genera of land plants now s...

The definitive hosts of Sarcocystis sinensis in water buffaloes have hitherto been unknown, but the close similarity of this species to the cat-transmitted Sarcocystis bovifelis in cattle suggested they were felids. In a previous study, two domestic cats were fed macroscopic sarcocysts of Sarcocystis fusiformis contained within or dissected from the esophageal muscles of water buffaloes, while ...

Saccharomyces cerevisiae cells lacking the cytochrome c oxidase (CcO) assembly factor Coa2 are impaired in Cox1 maturation and exhibit a rapid degradation of newly synthesized Cox1. The respiratory deficiency of coa2 Delta cells is suppressed either by the presence of a mutant allele of the Cox10 farnesyl transferase involved in heme a biosynthesis or through impaired proteolysis by the disrupt...

background: adult worms of orientobilharzia turkestanicum live in the portal veins, or intestinal veins of cattle, sheep, goat and many other mammals caus-ing orientobilharziasis. orientobilharziasis causes significant economic losses to livestock industry of iran. however, there is limited information about genotypes of o. turkestanicum in iran. methods: in this study, 30 isolates of o. turkes...

The initiation of transcription of the yeast mitochondrial genes coding for subunit I of cytochrome c oxidase (COX1) and for tRNA1Thr has been examined. COX1 messenger RNA synthesis is initiated in a conserved nonanucleotide sequence (ATATAAGTA) which we have previously found immediately upstream of ribosomal RNA genes at positions at which RNA synthesis starts. The 5'-end of the precursor of t...

background: the present study was aimed to investigate molecular diversity of echino-coccus granulosus isolates collected from human clinical samples using two mitochondrial genes cox1 and nad1 in iran . methods: forty seven human hydatid cysts were collected through surgery from two hospitals in tehran during 2010-2012. to determine the fertility of protoscoleces, the cyst fluids were subjecte...

in this study, molecular characterization of echinococcus granulosus sample obtained from water buffalo originating from southwest of iran was performed using comparative sequence analysis of cox1 mitochondrial gene. dna was extracted from protoscoleces removed from hydatid cyst from the liver of a 2-year-old male buffalo slaughtered in khuzestan province. molecular and phylogenetic analyses we...

Background: Hydatidosis is a neglected cyclo-zoonotic disease in Middle East countries particularly southeast of Iran which is caused by metacestode of tapeworm Echinococcus granulosus sensu lato. Human hydatidosis is a high public health priority in the area, however there is little known from a phylogenetic perspective on molecular epidemiology of adult Echinococcus spp. in Iranian shepherd d...