单词	revertant
释义	revertant /rɪˈvəːt(ə)nt / Biology adjective (Of a cell, organism, or strain) having reverted to the normal type from a mutant or abnormal form: this reverses the defect and creates revertant bacteria that do not require histidine... This process culminates when haploid lac +revertant cells overgrow the original clone of cells with an amplification. The bodywall muscle in these revertant animals is also indistinguishable from wild-type muscle when viewed under polarized light (data not shown). This gives the appearance of directed mutagenesis because only revertant cells survive mutagenesis. noun A revertant cell, organism, or strain: vaccine virus revertants... A lower intensity of mutagenesis can explain all observed revertants if each mutagenized cell has multiple copies of the lac operon. The numbers of revertants and viable cells were counted after incubation for 2 days at 37°C. We again found that most cosQ revertants were true revertants.
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