The identification of transformant bacterial colonies containing potential recombinant DNA clones can be performed using a wide variety of screening methods including colony hybridization and autoradiography, polymerase chain reaction (PCR) and restriction endonuclease analysis of individual plasmid DNA (1,5). While colony hybridization can efficiently screen large numbers of recombinant clones...

The human mitochondrial mutation mtDNA4977 is a 4,977-bp deletion that originates between two 13-bp direct repeats. We grew 220 colonies of cells, each from a single human cell. For each colony, we counted the number of cells and amplified the DNA by PCR to test for the presence of a deletion. To estimate the mutation fate, we used a model that describes the relationship between the mutation ra...

objective(s): up to now, many researches have been performed to improve the antitumoral effect of melanoma differentiation-associated gene-7 (mda-7) protein. the purpose of our research was to construct 3 expression vectors producing mda-7 in fusion with rgd (arginine-glycine-aspartic acid) peptide and evaluate their expression.     materials and methods: mda-7 gene with two different rgd seque...

Objective: To determine the molecular diversification and frequency of mecA Gene in MRSA infections hospitalised patients at Islamabad, Pakistan.
 Study design: Cross-sectional study.
 Place Duration: Pakistan Institute Medical Science, Pakistan, from Sep 2017 to 2018.
 Methodology: explore occurrence pathogenic S. aureus 500 samples were collected. All isolates further character...

In Brazil, the common bean is a crop with significant social and economic importance. The prospecting of N2 fixing bacteria crucial since biological nitrogen fixation (BNF) an eco-friendly technique. This work aimed to obtain characterize rhizobium isolates based on morpho-physiological, molecular, symbiotic efficiency parameters, using strains SEMIA 4077, 4080, 4088 as references. characterist...

PCR analysis of tRNA intergenic spacer (tDNA-PCR) and of the 16S-23S internal transcribed spacer (ITS-PCR) and random amplified polymorphic DNA (RAPD) analysis were evaluated for their usefulness in characterization of Enterobacter cloacae strains isolated from both clinical origins and vaccine microbial contamination. tDNA-PCR presented specific and reproducible patterns for Enterobacter sakaz...

The unprecedented wealth of databases that have become available in the era of next-generation sequencing has considerably increased our knowledge of bacterial genetic elements (GEs). At the same time, the advent of single-cell based approaches has brought realization that unsuspected heterogeneity may occur in the bacterial population from a single colony. The increasing use of PCR-based techn...