Method for constructing transformant not having selective marker gene
    8.
    发明授权
    Method for constructing transformant not having selective marker gene 失效
    构建不具有选择性标记基因的转化体的方法

    公开(公告)号:US5965444A

    公开(公告)日:1999-10-12

    申请号:US880745

    申请日:1997-06-23

    摘要: A DNA construct wherein a DNA fragment which is recombinable in yeast chromosomal DNA is directly or indirectly linked at both ends of a DNA fragment which comprises a pair of R sensitive sequences oriented in the same direction and flaking both an R gene placed under the control of an inducible promoter and an expressible selective marker gene, which is a DNA construct designed with the R sensitive sequences non-symmetrically shortened, so that no functionable R sensitive sequence remains after the R sensitive sequence recombination has occurred by expression of the R gene and the selective marker has been removed. Since no functionable R sensitive sequence remains after removal of the selective marker, recombination does not occur again, and thus the same selective marker may be used for multiple insertions of foreign genes.

    摘要翻译: 一种DNA构建体,其中在酵母染色体DNA中可重组的DNA片段在DNA片段的两端直接或间接连接,所述DNA片段包含一对沿相同方向取向的R敏感序列, 可诱导的启动子和可表达的选择性标记基因,其是用R敏感序列非对称缩短设计的DNA构建体,使得在通过R基因的表达发生R敏感序列重组后,不存在可操作的R敏感序列 选择性标记已被删除。 由于在去除选择性标记物之后不存在可操作的R敏感序列,因此重新不再次发生,因此相同的选择性标记可用于多次插入外源基因。