Altarsha, M., Benighaus, T., Kumar, D., & Thiel, W. (2009). How is the Reactivity of Cytochrome P450cam Affected by Thr252X Mutation? A QM/MM Study for X = Serine, Valine, Alanine, Glycine. Journal of the American Chemical Society, 131, 4755-4763. doi:10.1021/ja808744k.