The enzyme <small>L</small>-arabinonate dehydratase () catalyzes the chemical reaction
This enzyme belongs to the family of lyases, specifically the hydro-lyases, which cleave carbon-oxygen bonds. The systematic name of this enzyme class is <small>L</small>-arabinonate hydro-lyase (2-dehydro-3-deoxy-<small>L</small>-arabinonate-forming). Other names in common use include <small>L</small>-arabonate dehydrase, <small>L</small>-arabonate dehydratase, and <small>L</small>-arabinonate hydro-lyase. This enzyme participates in ascorbate and aldarate metabolism.