<p>This group of hypothetical proteins is a part of the IIIA subfamily of the haloacid dehalogenase (HAD) superfamily of hydrolases. All characterised members of this subfamily and most characterised members of the HAD superfamily are phosphatases. HAD superfamily phosphatases contain active site residues in several conserved catalytic motifs [<cite idref="PUB00003337"/>], all of which are found conserved here.This family consists of sequences from fungi, plants, cyanobacteria, Gram-positive bacteria and Deinococcus. There is presently no characterisation of any sequence in this family.</p>