查询词典 mutant

Baker's yeast;trehalose;freeze tolerance;trehalase mutant

面包酵母；海藻糖；冷冻耐性；海藻糖酶突变株

We use plate to check the lipase activity ,the lipase activity is very low, Compared to the wild type , the mutant could not form the clear halo on the olive oil plate but tributyrin plate, it showed that the 227 th Serine was essential for the lipase activity.

与野生型相比，突变体脂肪酶的酶活很低，不能在橄榄油平板上形成透明圈，但可以在以三丁酸甘油酯为底物的平板上形成透明圈，表明第227位丝氨酸可能对脂肪酶酶酶活具有重要影响。

The optimal conditions for protoplast isolation and regeneration of 4 auxotrophic mutant strains of Trichoderma were studied.

研究了4种营养缺陷型产纤维素酶菌的原生质体形成和再生条件。

Two analogues of Trichosanthes trypsin inhibitor I with the Cys14- Cys26 or Cys8- Cys20 disulfide bonds replaced by Tys or Phe and two negative control analogues substitution serine for cysteine at 14 and 26 or 8 and 20 positions were synthesized, respectively. The C14F-C26Y mutant had 1/140 inhibitory activity of native Trichosanthes trypsin inhibitor I to trypsin.

第二章是对天花粉胰蛋白酶抑制剂的两对二硫键的作用进行了研究，二硫键在蛋白质的折叠和功能中有重要的作用，芳香族氨基酸的芳环之间形成π-π共轭能否部分补偿二硫键的作用？

Villosum to wheat using ph lb mutant, as well as the development, identification and cytogenetic characteristics of a trigeneric hybrid germplasm with useful genes from Tavestivum, D.villosum and S.cereale.

结果发现：仅在50μg/mlBrdu溶液20～21h的培养条件下，9.3％的黑麦根尖细胞染色体产生脆性位点表达，主要分布在三条黑麦染色体的四个不同位点上，频率分别为1.4％、2.1％、4.3％和5.7％。

Blue dyed trypan analyses indicated that the lesion mimic trait of the mutant was caused by the programmer cell death.

锥虫蓝染色检测结果表明spl类病斑的形成和发展是一个程序性细胞死亡的过程。

A kind of M-TNF recombin ant with a stable,uncleavable mutant typewas constructed for its gene therap y.

为膜型TNF的转基因应用，构建一种可表达于胞膜而不被酶解的膜稳定型TNF重组体。

A kind of M-TNF recombin ant with a stable,uncleavable mutant typewas constructed for its gene therap y. Methods: On the basis of cloning the M-TNF c D NA encoding region,the authors constructed mTNFm,which could potentially expre ss on the c ell surface with a uncleavable type of TNF resulting in deletion of the sequence encoding enzymatic cleavage site of TNF-α-converting enzyme.

近年来研究表明，T NF的两种形式在受体结合、生物学效应等方面各具特征［3，4］。M-TNF通过直接接触在组织局部中发挥效应的特性，有望克服S-TNF在生物治疗应用中引起的远端及全身性毒副作用。

Results The vaccinal vestige, BCO immunization and familial traits were the risk factors of tuberculosis. Frequency of wildness, mutant heterozygote and homozygote of MBP-54 was difference in cases and controls.

MBP-54位点野生型、突变型杂合子、突变型纯合子3种基因型在病例组和对照组中的分布频率不同。

Two patients had YMDD mutant and virological breakthrough at 41 and 46 weeks.

两名患者产生 YMDD 变异病毒且有病毒在41， 46周时突破。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。