Figure 2: Conserved domains in hydra XPA. (a) Prediction of domains in hydra XPA by SMART: two Pfam domains XPA-N (amino acid 83 to 115) and XPA-C (amino acid 115 to 167) are present in the 257 amino acid long sequence. (b) Comparison of hydra XPA-N and -C domains with counterparts from other animals by multiple sequence alignment using ClustalW. Sequence of the XPA-C Pfam domain (box) is highly conserved across species. (Accession numbers of all sequences are given in Section 2).