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Pathways of carbon metabolism possible in strains with or without pyruvate kinase (PykA). Boxes denote substrates and/or products where arrows are used to denote pathways. Arrows to and from boxes are pathways; other arrows show reactions catalyzed by a single enzyme. Substrates are in text with serifs; pathways and enzymes in plain text. Colored arrows are used to denote glycolysis or gluconeogenesis in red, the tricarboxylic acid cycle in blue, and the glyoxylate cycle in magenta.
