نتایج جستجو برای: mutagenesis

تعداد نتایج: 27670  

Journal: :journal of physical & theoretical chemistry 2014
nastaran asghari moghaddam

p53 tumor suppressor gene, also known as “genome guardian” is mutated in more than half of allkind of cancers. in this study we have investigated the controls of environmental ph for p53 genemutation in point of specific sequence which is prone to mutagenesis. the most probable cancerousmutations occur as point mutations in exons 5-8 of p53 gene. the 175th codon of p53 is the thirdmost mutated ...

Journal: :jundishapur journal of microbiology 0
samia siddique department of chemistry, government college university lahore, lahore, pakistan quratulain syed food and biotechnology research center, pcsir laboratories complex, ferozpur lahore, lahore, pakistan ahmad adnan department of chemistry, government college university lahore, lahore, pakistan fahim ashraf qureshi office of research, innovation and commercialization, comsats institute of information and technology, islamabad, pakistan; office of research, innovation and commercialization, comsats institute of information and technology, islamabad, pakistan. tel: +92-3334101261, fax: +92-519247008

conclusions: the hereditary stability analysis of the uv mentioning 45 minutes revealed the uv exposure time for mutants and 3 represented the colony taken from the plate irradiated for 45 minutes mutant showed that the production of avermectin b1b remained constant and no reverse mutation occurred after 15 generations. results: avermectin b1b-hyper-producing mutant, produced using these three ...

Journal: :Horticulturae 2022

Mutagenesis is an important tool for breeding and genomic research. In this study, the germinated seeds isolated microspores of a double haploid line ‘FT’ were treated with EMS, respectively, aim comparing effects two approaches on generating mutants in Chinese cabbage. For microspore EMS mutagenesis, 0.12% 20 min, total 1268 plantlets obtained, 15 M1 screened mutation frequency 1.2%. seed 7800...

Journal: :iranian biomedical journal 0
عباس تهذیبی abbas tahzibi فاطمه کمال fatemeh kamal مهناز مظاهری اسدی mahnaz mazaheri assadi

a pseudomonas aeruginosa mutant derived by random mutagenesis with n-methyl-n¢-nitro-n-nitrosoguanidine, producing high levels of the rhamnolipid biosurfactants was selected on siegmund-wagner (sw) plates. the mutant designated p. aeruginosa ptcc1637 produces rhamnolipids at concentrations 10 time more than parent strain. nmr analysis and surface tension measurement showed that the biosurfactan...

Journal: :گوارش 0
hamid latifi navid saeid latifi-navid saber zahri

background: finding shows that there were several problems in the treatment of helicobacter pylori infection such as the emergence of resistance to the antibiotics, the risk of recrudescence, and the high cost of treatment. the ineffectiveness of conventional treatment mechanisms against cancer cells reveals the importance of peptides as a novel therapeutic approach. however, the short length o...

Background and purpose: Nowadays, food flavorings are widely used in Iran in different food and beverage items without considering their potential threats. This research aimed at investigating directed mutagenesis caused by flavorings using the Ames Test. Materials and methods: Direct mutagenesis of five artificial food flavorings (vanilla, banana, orange, coconut, and lemon), from three diffe...

Journal: :iranian journal of biotechnology 2008
hamed naghoosi farida behzadian alireza saeedinia seyed ali ghorashi

human granulocyte colony stimulating factor (hg-csf) induces proliferation and differentiation of granulocyte progenitor cells. this glycoprotein is currently being used for treatment of neutropenia, in patients who have undergone bone marrow transplantation. so far, different researchers have tried to enhance hg-csf biological activity and stability. in this study, polymerase chain reaction (p...

2005
Yang Du Sally E. Spence Nancy A. Jenkins Neal G. Copeland

word count: 178 Manuscript word count: 4936 Blood First Edition Paper, prepublished online June 16, 2005; DOI 10.1182/blood-2004-12-4840 Copyright © 2005 American Society of Hematology only. For personal use at PENN STATE UNIVERSITY on February 23, 2013. bloodjournal.hematologylibrary.org From

We developed several novel tools to genome wide screen for CNVs and SNPs in single cells. When applied to cleavage stage embryos from young fertile couples we discovered, unexpectedly, an extremely high incidence of chromosomal instability, a hallmark of tumorigenesis (Vanneste et al., Nature Medicine, 2009; Vanneste et al., Hum.Reprod., 2011). Not only mosaicisms for whole chromosome aneuploid...

Journal: : 2022

The global pollution of environment urges the screening effective natural protectors for correc-tion toxic and genotoxic action xenobiotics. Medicinal herbs contain a complex biologically ac-tive compounds that are potential sources such protective agent. In current study mutagenic antimutagenic activity alcoholic extracts peppermint (Mentha piperita L.) thyme (Thymus vulgaris L.), family Lamia...

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