I installed and ran proteinortho successfully. Next I used grab_proteins.pl to extract sequences of the identified orthologous groups. I get 32 fasta files on test data provided with the software. Does it mean that there are 32 orthologous groups detected by the software? Also I need to find the the sequences common to all the species for constructing the phylogenetic tree, Which tool can I use to find shared orthology among the different species?