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Ohtsuki, Takashi, Michiko Kimoto, Masahide Ishikawa, Tsuneo Mitsui, Ichiro Hirao, and Shigeyuki Yokoyama. Unnatural Base Pairs for Specific Transcription. The National Academy of Sciences, 2001.

Ohtsuki, Takashi, et al. Unnatural Base Pairs for Specific Transcription. The National Academy of Sciences, 2001.