| 摘要 |
PCT No. PCT/DK96/00038 Sec. 371 Date Jul. 17, 1997 Sec. 102(e) Date Jul. 17, 1997 PCT Filed Jan. 23, 1996 PCT Pub. No. WO96/23073 PCT Pub. Date Aug. 1, 1996Multicopy strains of gram-positive bacteria carrying multiple copies of a DNA sequence of interest may be constructed by use of a method involving introduction of a DNA construct comprising the DNA sequence of interest into the genome of the recipient cell by transposition and subsequent deletion of a marker gene used for selection of the cells having received the DNA construct by a resolution system. The multicopy strains are preferably free from a gene encoding an undesirable marker such as an antibiotic resistance marker. |
