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1·The recombinant strain is a strain obtained by deactivating capsular polysaccharide synthesis protein gene and carboxyl uridine phosphate decarboxylase gene in the abortus Brucella strain S19.

本发明的重组 菌株，是将流产布鲁氏菌菌株S19中的荚膜多糖合成蛋白基因和羧基尿苷磷酸脱羧酶 基因灭活得到的菌株。