Multiple alignment of AdhE proteins. The lactococcal AdhE sequence from strain DB1341 was aligned with the sequences of all AdhE entries in the databases by using the Clustal alignment of the MEGALIGN program (DNAstar, Lasergene). Shaded boxes show positions of residues identical to the consensus. Abbreviations: dbadhe, strain DB1341 AdhE; ecadhe, E. coli AdhE; caaad, C. acetobutylicum Aad; ehadhe, E. histolytica AdhE; gladhe, G. lamblia AdhE.