Fig. 2.
Formation and cleavage of bonds involving carbon atoms in central carbon metabolism. Carbon numbering is according to carbon positions in tree-ring glucose. Metabolites: 1,3BPGA, 1,3-bisphosphoglycerate; 3PGA, 3-phosphoglycerate; DHAP, dihydroxyacetone phosphate; FBP, fructose 1,6-bisphosphate; GAP, glyceraldehyde 3-phosphate; Pi, inorganic phosphate; RuBP, ribulose 1,5-bisphosphate. Numbers in parentheses denote enzymes: (1) Rubisco; (2) TPI, triose-phosphate isomerase; (3) aldolase, fructose-bisphosphate aldolase; (4) np-GAPDH, irreversible non-phosphorylating glyceraldehyde-3-phosphate dehydrogenase; (5) p-GAPDH, reversible phosphorylating glyceraldehyde-3-phosphate dehydrogenase; (6) PGK, phosphoglycerate kinase.