%0 Journal Article %T Expansion of the Genetic Alphabet: Unnatural Nucleobases and Their Applications %A Subhendu Sekhar Bag %A Jennifer M. Heemstra %A Yoshio Saito %A David M. Chenoweth %J Journal of Nucleic Acids %D 2012 %I Hindawi Publishing Corporation %R 10.1155/2012/718582 %U http://www.hindawi.com/journals/jna/2012/718582/