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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Biological activity of dihalogenated nucleoside analogues in the leukemia cell line HL-60 (A) or the control cell line HEK293 (B). Nucleoside analogues were serially diluted, and the percentage of killed cells was determined by XTT assay.