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将反向选择标记基因导入受体细胞,在一定的筛选条件下,带有反向选择标记基因的细胞株不能生长,而不带有反向选择标记基因的细胞株则能够生长,从而对目的基因的转化子进行无选择标记的筛选。
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food biotechnology
food bleaching agent
food-borne bioterrorism
foodborne disease
foodborne diseases burden
foodborne diseases surveillance
foodborne gastroenteritis caused by Salmonella
foodborne infection
foodborne intoxication
food-borne pathogenic bacteria
food-borne poisoning microorganisms
food-borne transmission
food-borne viral illness
food-borne virus
food-borne virus from aquatic product
food category system
food chain
food chain of aquatic ecosystem
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food coating agent
food code
food color
food colorant
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