| Module |
| M00127 | Thiamine biosynthesis, prokaryotes, AIR (+ DXP/tyrosine) => TMP/TPP |
| M00895 | Thiamine biosynthesis, prokaryotes, AIR (+ DXP/glycine) => TMP/TPP |
| M00896 | Thiamine biosynthesis, archaea, AIR (+ NAD+) => TMP/TPP |
| M00897 | Thiamine biosynthesis, plants, AIR (+ NAD+) => TMP/thiamine/TPP |
|