The effects of multiple replacements on the folding on the alpha subunit of tryptophan synthase from escherichia coli Chrunyk, B.A.; Tweedy, N.B.; Hurle, M.R.; Matthews, C.R. Journal of Cellular Biochemistry Suppl (13 Part A): 67 1989 0730-2312 https://eurekamag.com/research/033/795/033795629.php