Fig. 1
From: Engineering yeast artificial core promoter with designated base motifs
Concept of screening artificial core promoters assisted by yeast colony-color spectrum. The engineered artificial promoters changed the expression level of CrtY enzyme and tuned the lycopene–carotene composition, leading to variable yeast colony color distribution. In the strain with low lycopene production, we observed two colors as the original light red and new light yellow. In the higher-lycopene-production strain, we observed three colors as the original red and new orange and yellow