To produce bioethanol from model cyanobacteria such as Synechocystis. a two gene cassette consisting of genes encoding pyruvate decarboxylase (PDC) and alcohol dehydrogenase (ADH) are required to transform pyruvate first to acetaldehyde and then to ethanol. However the partition of pyruvate to ethanol comes at a cost. a reduction in biomass and pyruvate availability for other metaboli... https://www.roneverhart.com/Petite-n-Pretty-9021-Glow-Eye-Cheek-Pallete/