http://www.straightdope.com/mailbag/mbooger.html
The article about DNA from boogers was lacking in only one thing. The omission form the answer of the contents of a boogers.
What exactly do boogers consist of? Whats the chemical symbol for boogers?
They are primarily mucus, combined with some dust and other particulate matter from inhaled air, and some material from the lining of the nasal passages.