Conserved motifs in putative glutamate N-acetyltransferases. The homologues to the (A) domain of ArgH(A) of M. abyssi and belonging to six ArgH(A), three ArgHX and two ArgA proteins have been multiply aligned and edited in BioEdit software . A consensus sequence has been computed. Very strongly conserved residues(letters) and moderately conserved ones (stars) are indicated. The four motifs containing the residues identified by comparative analysis of N-acetyltransferases which use acetylCoA as donor of the acetyl group  and references therein] are underlined by thick lines and numbered. Species names are according to SwissProt conventions.