^Sekiya, T., Contreras, R., Takeya, T. and Khorana, H.G. (1979). “Total synthesis of a tyrosine suppressor transfer RNA gene. XVII. Transcription, in vitro, of the synthetic gene and processing of the primary transcript to transfer RNA”. J. Biol. Chem.254 (13): 5802-5816. PMID109442.