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HeLa cells were treated with LP-EEDQ2, Tf-LP-EEDQ2, or Tf-LP-EEDQ2 with holo-Tf in vitro and then measured by flow cytometery. Data represent the mean± standard deviation (n = 3). Significantly different at **p<0.01 (Tf-LP-EEDQ2 versus Tf-LP-EEDQ2 + holo-Tf).
