Damages in DNA are known to be a root cause to numerous diseases that lead to ageing. Methylation is a type of DNA damage that occurs at high level in the brain tissue and affects the nature of electron transport in DNA. The extend of changes of electron mobility due to damages in DNA is not well quantified. In this proposal the effects of damages to electron mobility will be studied by comparing the electron mobility and topology in two synthetic double strand DNA samples; normal and damaged oligomers. The damage is in the form of methylation.