2.2.1.1 transketolase - 2.2.1.10 2-amino-3,7-dideoxy-D-threo-hept-6-ulosonate synthase - 2.2.1.11 6-deoxy-5-ketofructose 1-phosphate synthase - 2.2.1.12 3-acetyloctanal synthase - 2.2.1.13 apulose-4-phosphate transketolase - 2.2.1.14 6-deoxy-6-sulfo-D-fructose transaldolase - 2.2.1.15 6-deoxy-6-sulfo-D-fructose transketolase - 2.2.1.2 transaldolase - 2.2.1.3 formaldehyde transketolase - 2.2.1.4 acetoin-ribose-5-phosphate transaldolase -