Total genomic DNA from blood samples of the animals were isolated and analyzed for 5-methylcytidine, as described previously by our group, using the Quick-gDNATM MiniPrep kit from Zymo research (Irvine, CA, United States). After quantification, an equal amount of genomic DNA was used to estimate global levels of 5-methylcytosine using 5-mC DNA ELISA kit from Zymo research (Irvine, CA, United States) by following the manufacturer’s instructions as described earlier by our group (Narayanan et al., 2014 (link); Veeranki et al., 2015 (link)).
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