<p>This entry represents a subfamily of the short chain dehydrogenases. Characterised members so far as 3-hydroxybutyrate dehydrogenases and are found in species that accumulate ester polymers called polyhydroxyalkanoic acids (PHAs) under certain conditions. Several members of the family are from species not known to accumulate PHAs, including <taxon tax_id="182710">Oceanobacillus iheyensis</taxon> and <taxon tax_id="1423">Bacillus subtilis</taxon>. However, polymer formation is not required for there be a role for 3-hydroxybutyrate dehydrogenase; it may be members of this family have the same function in those species.</p> 3-hydroxybutyrate dehydrogenase