<p>Thiamine monophosphate synthase (TMP) (<db_xref db="EC" dbkey="2.5.1.3"/>) catalyzes the substitution of the pyrophosphate of 2-methyl-4-amino-5- hydroxymethylpyrimidine pyrophosphate by 4-methyl-5- (beta-hydroxyethyl)thiazole phosphate to yield thiamine phosphate in the thiamine biosynthesis pathway [<cite idref="PUB00005784"/>].</p><p>TENI, a protein from <taxon tax_id="1423">Bacillus subtilis</taxon> that regulates the production of several extracellular enzymes by reducing alkaline protease production belongs to this group [<cite idref="PUB00007481"/>].</p>