Efficient and sequence-independent replication of DNA containing a third base pair establishes a functional six-letter genetic alphabet,
, Proc Natl Acad Sci U S A, Volume 109, Number 30, p.12005-10, (2012)
Expanding the scope of replicable unnatural DNA: stepwise optimization of a predominantly hydrophobic base pair,
, Journal of the American Chemical Society, Volume 135, Number 14, p.5408-19, (2013)