Figure 3.

Amino acid sequence alignment of celery and cucurbit PP2 proteins. The alignment was performed using the ClustalW method (v1.7; Thompson et al., 1994) available in the GCG package. White letters on black are identical amino acid residues; white on dark gray are strongly similar; and black on light gray are weakly similar. The conserved motifs A through D of the PP2 domain are underlined. Gaps were introduced to produce the alignment. *, Conserved Trp residues. #, Conserved Cys residues. $, Conserved Tyr residues.