Protein alignments of the second gene in the operon, wPip0283, and its homologs in wPip(Pel). Dots indicate identities with respect to wPip (Pel)_0283. Grey shaded residues show the C-terminally truncated homolog, wPip0295; its terminus is indicated by a grey circle. Black shaded residues show N-terminally truncated homolog, wPip1291; its N-terminus is indicated by a black circle. At the bottom of the alignment dark grey boxed residues show the second N-terminally truncated homolog, wPip1292; its N-terminus is shown by the dark grey circle. Asterisks indicate the eukaryotic Ulp1 Ubiquitin-like C48 SUMO protease domain (pfam02902) with conserved catalytic residues identified by upward black arrows (Li and Hochstrasser, 1999; Mossessova and Lima, 2000). We note that the N-terminus of wPip_1291 begins downstream of the C-terminus of wPip_0295.