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Clone formation assay conducted on A549 cells without treatment or with KA, KA-NLC, HA20-KA-NLC, and HA130-KA-NLC treatments. (A) Representative images of clone formation assays. (B) Relative clone numbers after different treatments. The data are presented as the mean ± SD (n = 3). * p < 0.05, *** p < 0.001.
