1.14.13.22 metabolism flavoprotein that carries out the archetypical Baeyer-Villiger oxidation of a variety of cyclic ketones into lactones, size and shape of substrate binding pocket are adjustable to accommodate a diverse range of substrates 698499 1.14.13.22 metabolism residue T187 is critical for locking NADP+ in a configuration that dramatically accelerates O2 activation by the reduced flavin. W490 also promotes O2 activation (albeit less so than T187) and accelerates the reaction between the C4a-peroxyflavin and cyclohexanone 764018 1.14.13.22 metabolism wild type elicits a kinetic isotope effect of 4.7 and 1.1 with 4(R)-[4-2H]NADPH and 4(S)-[4-2H]NADPH, respectively, consistent with transfer of the proR hydrogen to FAD 764020