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More recent studies suggest an epigenetic origin, indicating that sulphide-rich iron formation is a replacement type rather than a primary sedimentary facies.
Ores formed at the same time as their host rocks are referred to as syngenetic; ores formed after the host rock are called epigenetic .
However, backcrossing is a gradual procedure that, apart from being lengthy, cannot ascertain that genetic and epigenetic changes will modify the original nuclear genotype.
Hence, we investigated molecular genetic and epigenetic events in oral carcinogenesis.
Such variations might arise from minor genetic differences or by epigenetic influences causing induction, enhancement or inhibition of repair enzyme synthesis or activity.
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