ABBREVIATIONS
FAD, flavin adenosine dinucleotide; FADH-, the anionic form of reduced FAD; D1, Catalytic distance, i.e., the distance between substrate αC-H and FAD N(5); KPI , Product inhibition constant; KIV, α-keto valine; KMTB, α-Keto-γ-methylthiobutyric acid; epPCR, error-prone polymerase chain reaction.