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arXiv 0712.4382q-bio.PE
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信息和健身

Information and fitness

Samuel F. Taylor, Naftali Tishby, William Bialek

摘要:

生物体的生长速度取决于外部条件和内部状态,如各种基因的表达水平。我们表明,要实现一个标准的平均增长率在合奏的条件下,内部变量必须携带有关这些条件的信息位数的最小值。因此,进化竞争可以选择在抽象的信息论意义上更有效的细胞机制。根据最近的实验估计表明,合理的增长率所需的最低信息接近通过生物现实的监管机制可以传达的最大信息。这些想法最直接地适用于单细胞生物,但也有类似于高等生物的问题,我们建议对这两种情况进行新的实验。

英文摘要:

The growth rate of organisms depends both on external conditions and on internal states, such as the expression levels of various genes. We show that to achieve a criterion mean growth rate over an ensemble of conditions, the internal variables must carry a minimum number of bits of information about those conditions. Evolutionary competition thus can select for cellular mechanisms that are more efficient in an abstract, information theoretic sense. Estimates based on recent experiments suggest that the minimum information required for reasonable growth rates is close to the maximum information that can be conveyed through biologically realistic regulatory mechanisms. These ideas are applicable most directly to unicellular organisms, but there are analogies to problems in higher organisms, and we suggest new experiments for both cases.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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