نتایج جستجو برای: ژن 16s rrna
تعداد نتایج: 50970 فیلتر نتایج به سال:
Archaea are widespread in marine sediments, but their occurrence and relationship with natural salinity gradients in estuarine sediments is not well understood. This study investigated the abundance and diversity of Archaea in sediments at three sites [Brightlingsea (BR), Alresford (AR) and Hythe (HY)] along the Colne Estuary, using quantitative real-time PCR (qPCR) of 16S rRNA genes, DNA hybri...
There are barriers to cross-expression of genes between Bacteroides spp. and Escherichia coli. In this study, a lux-based reporter system was developed for Bacteroides and used to compare the promoter structure and function of a Bacteroides thetaiotaomicron 4001 (BT4001) 16S rRNA promoter with those of E. coli in vivo. Analysis of the BT4001 sequences upstream of the 16S rRNA gene revealed the ...
Heterogeneity among ribosomal operons in Vibrio vulnificus is purported as a probabilistic indicator of strain virulence and classifies V. vulnificus strains as 16S rRNA genes type A and B. In this study, 16S rRNA genes typing of V. vulnificus strains isolated from the Valencia city coast, in the western Mediterranean, showed that 24 out of 30 isolates were type A, one was type B and five could...
Ruminal archaeomes of two mature sheep grazing in the Scottish uplands were analysed by different sequencing and analysis methods in order to compare the apparent archaeal communities. All methods revealed that the majority of methanogens belonged to the Methanobacteriales order containing the Methanobrevibacter, Methanosphaera and Methanobacteria genera. Sanger sequenced 1.3 kb 16S rRNA gene a...
با توجه به اهمیت میگوی سرتیز (Metapenaeus affinis) در چرخه صیادی خلیجفارس، بررسی مقدماتی ساختار ژنتیکی جمعیت این گونه با توالییابی ژن میتوکندریایی 16S rRNA انجام شد. تعداد 18 قطعه میگو از سه منطقه بندرعباس، بوشهر و خ...
یکی از ذخایر باارزش شیلاتی موجود در خلیجفارس، ماهی شوریده بانام علمی Otolithes ruber متعلق به خانواده شوریده ماهیان (Sciaenidae) میباشد. ازاینرو شناخت جمعیتهای این ماهی در راستای حفظ ذخایر ژنتیکی اینگونه بسیار ضروری میباشد. منطقه موردبررسی در این پژوهش آبهای ساحلی ایران در خلیجفارس و دریای عمان شامل آبادان، بوشهر، دیر، بندرعباس و جاسک بود. تعداد 5 نمونه ماهی شوریده از هر منطقه جمعآوری ...
INTRODUCTION Mycoplasma pneumoniae (M. pneumoniae) is the most common atypical pathogen that causes respiratory infections in humans. Laboratory tests are important in the diagnosis of M. pneumoniae because of the atypical features in clinical signs and symptoms. Nowadays, both the P1 adhesin gene and 16S ribosomal (r) RNA (rRNA) gene of M. pneumoniae have been widely detected by polymerase cha...
AIMS Test the choice of 16S rRNA gene amplicon and data analysis method on the accuracy of identification of clinically important bacteria utilizing a benchtop sequencer. METHODS AND RESULTS Nine 16S rRNA amplicons were tested on an Ion Torrent PGM to identify 41 strains of clinical importance. The V1-V2 region identified 40 of 41 isolates to the species level. Three data analysis methods wer...
introduction many studies have shown epidemiological links between strains isolated in tap water, and those isolated from patients. molecular methods linked to pcr are more reliable and faster for identification of non- tuberculous mycobacteria(ntm). in this study molecular methods were used for identification and typing of ntm. materials and methods five hundred ml of 85 water samp...
The halophilic archaebacterium, Haloarcula marismortui, contains two nonadjacent ribosomal RNA operons, designated rrnA and rrnB, in its genome. The 16S rRNA genes within these operons are 1472 nucleotides in length and differ by nucleotide substitutions at 74 positions. The substitutions are not uniformly distributed but rather are localized within three domains of 16S rRNA; more than two-thir...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید