查询词典 mutation

The research progress on Dispyros kaki identification in morphological markers, cytological markers, biochemical markers and molecular markers and the new germplasm creation in cross-breeding, selection of bud mutation were summarised.

从形态学标记、细胞学标记、生化标记和DNA标记4个方面对柿品种的鉴定进行了阐述及评价；从有性杂交育种、芽变选种种质创新方面阐述了柿育种。

Therefore selection breeding of new cultivars with great ornamentalvalue and cold-resistant cultivars are very important Sexual crossing breeding and bud mutation selection breeding are conventional breedingmethods in Floribunda roses.

但因为其品种较为单一，且基本都依靠进口，缺乏具有我国自主产权的优良丰花月季品种，而且我国北方由于气温低，还没有可以广泛栽培并能露地越冬的品种，因此培育观赏性高的新品种和抗寒品种成为当前园林植物育种的热点。

Petal pear ; white pear; bud mutation ; stripe

花瓣梨；白梨；芽变；条纹

Chao Shu thorn bud mutation until after the soft, fresh Shuangcui a bite, slowly have the aroma of blooming fresh vegetable seepage full mouth, are!

直至炒熟之后刺芽变软，爽脆有咬劲，慢慢就有野菜清新勃发的香气渗满口腔，正！

The wild type protein and mutant S103A was shown to exhibit the same folding tendency as that chemically prepared from chicken heart cytochrome c, while mutants containin the V92A mutation not any more.

表达纯化的、野生型的鸡脱血红素细胞色素c具有从鸡心细胞色素c化学制备的蛋白相同的折叠性质。

Research with bacteria has shown that the smallest unit of recombination or mutation is one base pair, while the size of a unit of function can be determined by the CIS-TRANS TEST.

通过对细菌的研究，结果显示最小的重组突变单位是一个碱基对，而一个功能单位的大小能够由顺反试验决定。

Cis-trans effect The phenomenon resulting from recombination within a gene, in which a mutation is only expressed in the phenotype if the mutant pseudoalleles are on different homologous chromosomes.

顺反效应：如果在同源染色体上假等位基因是不同的，变异仅仅在表现型中表达的基因内重组现象。

The immunoglobulin like anti AChR antibody without complement binding activity is successfully made from a pathogenic anti AChR antibody IgG 637 by site directed mutagenesis.Key words:receptor, cholinergic;myasthenia gravis;point mutation;complement-binding;antibodies

本研究利用定点突变技术，从完型抗乙酰胆碱受体抗体IgG 637制备了不能激活补体的突变型抗乙酰胆碱受体抗体IgG 637/K 322 A，为最终制备出可用于治疗重症肌无力的无补体激活功能的单价抗乙酰胆碱受体抗体提供依据。

We study the dynamical behavior of the epidemiological model with pathogen mutation on small-world networks, and discuss the influence of the immunity duration $\tau_{R}$, the cross-immunity threshold $h_{thr}$, and system size $N$ on epidemic dynamics.

我们研究了一种病毒变异传播模型在小世界网络中的动态行为，讨论了免疫时间$\tau_{R}$，交叉免疫阈值$h_{thr}$和系统大小$N$对传播动力学的影响。

Prenatal testing for pregnancies at increased risk is possible if the disease-causing mutation in the family is known.

当家族中的致病突变已知，高危妊娠的产前诊断是可能的。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。