Geobacter central metabolism elucidated using identified peptides. Arrow thicknesses indicate relative abundances based on spectral count data for each protein. 2-Ims, 2-isopropylmalate synthase; Ack, acetate kinase; Acs, acetolactate synthase; Aco, aconitase; Aho, acetyl-CoA hydrolase; Akgd, alpha ketoglutarate dehydrogenase; Ato, acetyl-CoA transferase; Cs, citrate synthase; Frb, fructose bisphosphatase; Fum, fumarase; Gpd, glyceraldehyde-3-phosphate dehydrogenase; Icdh, isocitrate dehydrogenase; Kar, ketol-acid reductoisomerase; Mdh, malate dehydrogenase; Pepc, phosphoenolpyruvate carboxykinase; Por, pyruvate ferredoxin oxidoreductase; Ppd, pyruvate phosphate dikinase; Pph, phosphopyruvate hydratase; Ppk, phosphoglycerate kinase; Pta, phosphotransacetylase; Pyc, pyruvate carboxylase; Sucoas, succinyl-CoA synthetase; Sudh, succinyl-CoA dehydrogenase.