Azoknak, akik az eredeti forrásra is kiváncsiak:

Aaron M. Leconte, Gil Tae Hwang, Shigeo Matsuda, Petr Capek, Yoshiyuki Hari, and Floyd E. Romesberg:

"Discovery, Characterization, and Optimization of an Unnatural Base Pair for Expansion of the Genetic Alphabet"

J. Am. Chem. Soc., ASAP Article 10.1021/ja078223d S0002-7863(07)08223-6

http://pubs.acs.org/cgi-bin/abstract.cgi/jacsat/asap/abs/ja078223d.html