期刊
ANALYTICAL BIOCHEMISTRY
卷 373, 期 2, 页码 389-391出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ab.2007.10.034
关键词
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A rapid site-directed mutagenesis strategy using homologous recombination and DpnI digestion of the template in Escherichia coli is described. Briefly, inverse polymerase chain reaction amplification of the entire circular plasmid was performed by mutagenic primers with overlapping sequences (similar to 15 bp) for generating PCR products with similar to 15 bp of homology on the terminal ends. On direct transformation of the amplified PCR products into restriction endonuclease DpnI-expressing E. coli BUNDpnI, homologous recombination occurs in E. coli while the original templates are removed via DpnI digestion in vivo, thus yielding clones harboring mutated circular plasmids. Nearly 100% efficiency was attained when this strategy was used to modify DNA sequences. (C) 2007 Elsevier Inc. All rights reserved.
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