Alignment of the putative rbcS clusters and ESTs with the A. acetabulum rbcS sequence from Genbank. The 5 ESTs or clusters that showed homology to the rbcS gene were aligned to the A. acetabulum rbcS mRNA sequence (Aa-rbcS) published in Genbank (sequence id: X51815). The black box represents the ORF of the Aa-rbcS sequence. The white boxes represent, for each EST or cluster, regions of high identity with the Aa-rbcS sequence. The percentage of identity in these regions varied between 84% and 89%. The rest of the sequences (black line) showed little or no identity (<50%) to the Aa-rbcS sequence or to each other. At the amino acid level, the conserved regions (white boxes) were 94 to 96% identical to each other or to the Aa-rbcS sequence.