نتایج جستجو برای: chromosomal integration

تعداد نتایج: 268172  

1980
John Innes

The properties of various mutants showed that, in the presence of an inorganic nitrogen source, agar utilization by Streptomyces coelicolor requires the action of at least three groups of enzymes: a diffusible or cell-free extracellular agarase, some further degradative step(s), and the enzymes of galactose metabolism. Two unselected mutations (dag), both leading to loss of diffusible agarase a...

Journal: :cell journal 0

objective: chromosomal aberrations are common causes of multiple anomaly syndromes. recurrent chromosomal aberrations have been identified by conventional cytogenetic methods used widely as one of the most important clinical diagnostic techniques. materials and methods: in this retrospective study, the incidences of chromosomal aberrations were evaluated in a six year period from 2005 to 2011 i...

Journal: :journal of biotechnology and health sciences 0
reza najafipour cellular and molecular research center, qazvin university of medical sciences, qazvin, ir iran javad ansari cellular and molecular research center, qazvin university of medical sciences, qazvin, ir iran manijeh jalilvand cellular and molecular research center, qazvin university of medical sciences, qazvin, ir iran sahar moghbelinejad cellular and molecular research center, qazvin university of medical sciences, qazvin, ir iran; cellular and molecular research center, qazvin university of medical sciences, qazvin, ir iran. tel: +98-2813336001, fax: +98-2813324970

background chromosomal abnormality plays an important role in different types of miscarriages. objectives the present study was designed to investigation chromosomal anomalies in three groups of couples with recurrent abortion (ra), spontaneous abortion (sa) and still birth (sb). patients and methods in this retrospective study, the frequency of chromosomal aberrations was investigated among 26...

Fatemeh Mirzaie M Darvish M.R Bazr Afshan S Falahati

Background & Aims: Chromosome abnormalities are a major cause of miscarriage and neonatal mortality. The present study aimed to determine the association of fetal and parents chromosomal abnormalities with congenital anomalies. Methods: A cross-sectional study was performed in a tertiary referral center (Afzalipour Hospital) over 16 months period (2011-2012). The study groups consisted of 77 fe...

افشین عبدی راد, , سعید رضا غفاری, , فرخ تیرگری, , پیمان نوشیروان‌پور, ,

Background: Nonlethal genetic damage is the basis for carcinogenesis. As various gene aberrations accumulate, malignant tumors are formed, regardless of whether the genetic damage is subtle or large enough to be distinguished in a karyotype. The study of chromosomal changes in tumor cells is important in the identification of oncogenes and tumor suppressor genes by molecular cloning of genes in...

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