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Analysis of the overall percentage of methylation in the placenta. Placental samples with methylation percentages <15% were analyzed regardless of exposure to cigarette smoke during pregnancy. The graph shows the percentage of the overall methylation of genomic DNA from the placentas of non-smoking women and women smokers, as well as the AGS human gastric adenocarcinoma cell line to allow the sensitivity of the test for identifying overall methylation markers to be validated.
