安普霉素抗性基因2) chloramphenicol resistance gene 氯霉素抗性基因1. In the present study,chloramphenicol resistance gene(Cm~r)was cloned into the genomic DNA of brucella suis S2 strain by homologous recombination with knocking out the WbkC gene,and obtained the recombinant rS2-WbkC. 本研究通过...