Transformation of N. elongata with rifR chromosomal DNA.

aTransformation frequency is expressed as the number of rifR bacteria/total CFUs. Values are averaged from three independent experiments ± SEM. “转化频率以利福平抗性（rifR）细菌数与总菌落形成单位（Colony-Forming Units，CFUs）的比值表示。所有数值均为三次独立重复实验的平均值，结果以均值±标准误（Standard Error of the Mean，SEM）呈现。