School of Life Sciences;
North China University of Science and Technology;
Tangshan 063210;
China;
State Key Laboratory of Microbial Resources;
Institute of Microbiology;
Chinese Academy of Sciences;
Beijing 100101;
China;
Shengxue Dacheng Pharmaceutical Co.;
Ltd.;
Shijiazhuang 051430;
China;
Counterselectable system; pyrF; 5-Fluoroorotic acid(5-FOA); Gene deletion; Streptomyces rimosus;