^Ambrogelly A, Palioura S, Söll D. Natural expansion of the genetic code. Nat Chem Biol. Jan 2007, 3 (1): 29–35 [2017-03-30]. PMID 17173027. doi:10.1038/nchembio847. (原始内容于2017-06-22).
參考文獻编辑
Nelson, David L.; Cox, Michael M. Lehninger Principles of Biochemistry 3rd. Worth Publishers. 2000. ISBN 1-57259-153-6.
Kyte, J.; Doolittle, R. F. A simple method for displaying the hydropathic character of a protein. J. Mol. Biol. 1982, 157 (1): 105–132. PMID 7108955. doi:10.1016/0022-2836(82)90515-0.
Meierhenrich, Uwe J. Amino acids and the asymmetry of life 1st. Springer. 2008. ISBN 978-3-540-76885-2.
Biochemistry, Harpers. Harpers Illustrated Biochemistry 30st. Lange. 2015. ISBN 978-0-07-182534-4.