<p> This presumed domain is functionally uncharacterised. This domain is found in bacteria, archaea and eukaryotes. This domain is about 200 amino acids in length. This domain is found associated with <db_xref db="PFAM" dbkey="PF00013"/>, <db_xref db="PFAM" dbkey="PF01966"/>. This domain has a single completely conserved residue A that may be functionally important. </p>