| 1. | It indicated that the magnetosome deleted phenotype w as caused by tn5 insertion
Southern杂交验证磁小体缺失突变确为tn5插入所致。 |
| 2. | Microcalorimetric study on deletion mutagenesis of the gene promoter sequences from the extremely halophilic archaea
极端嗜盐古生菌启动子序列缺失突变的微量热研究 |
| 3. | 2 ) dna sequence variations were all nucleotide substitutions and neither insertions nor deletions were detected
2山na序列变异均为核耷酸替换，无插人和缺失突变。 |
| 4. | The availability of a newly selected aba - deficient arabidopsis mutant ios5 makes it convenient to study aba signaling
新筛选的拟南芥aba缺失突变体los5为研究aba信号转导提供了便利的条件。 |
| 5. | Two magnetosome deletion mutants were constructed by conjugative transposon mutagensis and the application of this genetic system . the two magnetosome deletion mutants were named as nm4 and nm21 respectively
并利用此体系，通过接合转座诱变技术，获得了2个磁小体缺失突变株： nm4 、 nm21 。 |
| 6. | In most wild type e . coli strains containing heterologous pha synthase genes , the amount of pha accumulation was almost undetectable while in e . coli km32b the amount of pha accumulation were clearly visible
在多种野生型大肠杆菌中，尽管使用了各种不同的表达载体，也很难获得可供检测的pha ；但应用大肠杆菌的fqdb缺失突变株却可以获得较多量的pha 。 |
| 7. | Based on the results that were investigated on the mutants etr1 , a member of ethylene receptor genes , etr1 , ers1 , etr2 , ein4 , ers2 , ethylene receptor genes might play a negative role in regulating response to ethylene
Etr1是五个乙烯受体基因家簇( etr1 ， ers1 ， etr2 ， ein4 ， ers2 )中的一员，对他们的功能缺失突变体研究表明他们在乙烯受体系统中可能是起负调控作用。 |
| 8. | A 12kb region involved in dnd phenotype was confirmed to be deleted completely from the chromosome of zx1 . six subclones varying in size from the 12kb region involved in dnd phenotype were cloned onto an integrative vector pset152 and were introduced into zx1
将这些不同的亚克隆以整合形式导入dnd表型缺失突变株zx1中，根据互补能力的不同确定了这段12kb区域中dnd功能必需区有8 . 3kb 。 |
| 9. | The derivatives of phz2104 resulting from the disruption of the three putative orfs respectively by aada can not confer dnd phenotype on zx1 . using erase - a - base system , a series of exoiii progressive deletion mutants were prepared for sequencing of add gene cluster
将add基因簇亚克隆到测序载体pbluescript sk ( + )上，采用exo缺失突变法得到了66个单向递减缺失亚克隆，然后对这些克隆进行测序。 |
| 10. | It was devoted that class ii promoter was stimulated by ie180 . there is not tata box on the upstream of the promoter , but there are binding sites of protein in the upstream of the promoter . david and his company identified ie gene in the human cytomegalovirus virus dna segment
目前国内外没有关于野生型的ie180或其突变体对sv40和cmv启动子调控作用的报导，此研究可为ie180基因缺失突变体，在人的巨噬细胞病毒和猴空泡病毒40控制方面的应用提供理论依据。 |
