BDH2 and atrial fibrillation: Thus the effects of association mutation of genes (ILV2, ILV6, ILV3, ILV5, BDH1, BDH2, aldB, mae1, and mleS) on deacidification, diacetyl and other flavors (organic acids, higher alcohols and esters) metabolism in S. uvarum after AF were detected in the study.