نتایج جستجو برای: prevent their reversion
تعداد نتایج: 2388140 فیلتر نتایج به سال:
The rev6-1 allele was isolated in a screen for mutants deficient for UV-induced reversion of the frameshift mutation his4-38. Preliminary testing showed that the rev6-1 mutant was substantially deficient for UV-induced reversion of arg4-17 and ilv1-92 and markedly UV sensitive. Unlike other REV genes, which encode DNA polymerases and an associated subunit, REV6 has been found to be identical to...
The switch from vegetative to reproductive growth is extremely stable even if plants are only transiently exposed to environmental stimuli that trigger flowering. In the photoperiodic pathway, a mobile signal, florigen, encoded by FLOWERING LOCUS T (FT) in Arabidopsis thaliana, induces flowering. Because FT activity in leaves is not maintained after transient photoperiodic induction, the molecu...
Numerous studies now support that human immunodeficiency virus type 1 (HIV-1) evolution is influenced by immune selection pressure, with population studies showing an association between specific HLA alleles and mutations within defined cytotoxic T-lymphocyte epitopes. Here we combine sequence data and functional studies of CD8 T-cell responses to demonstrate that allele-specific immune pressur...
1 9 1 8, there has been considerable con-troversv as to its merits in conversion of patients with chronic atrial fibrillation to normal sinus rhythm. Although actual reversion is highly successful and may be accomplished in over 80 per cent of patients ,2'3 it was felt that mural thrombi might be dislodged with resultant disastrous embolization, especially upon resumed contraction of the auricl...
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