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Murao, K., Hasegawa, T., & Ishikura, H. (1976). 5-Methoxyuridine: a new minor constituent located in the first position of the anticodon of tRNAAla, tRNAThr, and tRNAVal from Bacillus subtilis. Nucleic Acids Research, 3(10), 2851–2860. doi:10.1093/nar/3.10.2851 
10.1093/nar/3.10.2851