Fig. 4

a Metabolic pathways and gene regulatory mechanisms of galactose, melibiose and maltose. The red parts of the pathways are specific to the Chinese Maotai-flavored liquor yeast MT1 strain. b Dynamic curves of fermentation parameters. (1) YPD medium (1 % yeast extract, 2 % peptone and 2 % glucose); (2) modified YPD medium (1 % yeast extract, 2 % peptone, 1 % glucose and 1 % maltose); (3) modified YPD medium (10 % yeast extract, 20 % peptone, 1 % glucose and 1 % galactose). The open figures represent the Saccharomyces cerevisiae type strain S288c; the solid figures represent MT1