... 100 100Minus pantoate 2Minus ATP 46 50Minus ATP, minus pantoate 3Minus ATP, minus Pi45Minus ATP, minus ADP 3Eqn (1)Complete system 20Minus pantoate 1Minus ATP NDMinus ATP, minus pantoate ... the hexokinase, ribokinase, and galacto-kinase families of sugar kinases. Protein Sci2, 31–40.18 So¨ding J (2005) Protein homology detection by HMM–HMM comparison. Bioinformatics 21, 951–960.19 ... pantoate, pantothenate (vitamin B5), and 4¢-phosphopantothe-nate. The remaining intermediates, as well as the branch for pro-duction of b-alanine, are left out for clarity. For six of these steps,homologs...