Alignment of selected members of the 8.9 kDa family of hard ticks. The asterisk (*) shows the 6 conserved cysteines. The sequences obtained from the NR database are indicated by 5 letters (3 from the genus and 2 from the species name) followed by the NCBI accession number. Remaining sequences were deduced from dbEST and are available from Francischetti et al. .