in alkane-grown cells , lipogenesis is repressed and carbon is able to flow from the alkanes via acetyl coa , oxaloacetate and pyruvate into pentoses and hexoses in a unidirectional manner , because of the strong repression of pyruvate kinase and the increased activities of phosphoenolpyruvate kinase and fructose 1,6-biosphosphatase under these conditions .
C0019494
hexoses
C0016745
fructose