Fig. 6
From: Assessment of the toxic effect of benzalkonium chloride on human limbal stem cells

Colony-forming efficiency based on the total number of colonies (total), holoclones, (holo-), meroclones (mero-), and paraclones (para-) (passage 4th ). (A) A representative image of the holoclone (I), meroclone (II) and paraclone (III) in untreated cells (CTRL). (B) A representative image of the colony-forming assay and (C) the percentage of colonies in control (CTRL) and BAC-treated culture (BAC). The bars represent means ± SD. Student’s t-test. *p < 0.001.