期刊
CURRENT OPINION IN BIOTECHNOLOGY
卷 22, 期 4, 页码 547-551出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.copbio.2011.04.017
关键词
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资金
- Foundation for Polish Science
- MNiSW [3970/B/P01/2009/36]
Genome-wide mutagenesis studies indicate that up to about 90% of genes in bacteria and 80% in eukaryotes can be inactivated individually leaving an organism viable, often seemingly unaffected. Several strategies are used to learn what these apparently dispensable genes contribute to fitness. Assays of growth under hundreds of physical and chemical stresses are among the most effective experimental approaches. Comparative studies of genomic DNA sequences continue to be valuable in discriminating between the core bacterial genome and the more variable niche-specific genes. The concept of the core genome appears currently unfeasible for eukaryotes but progress has been made in understanding why they contain numerous gene duplicates.
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