Genomic sequencing has identified three different typical plant aspartic proteinases in the genome ofArabidopsis thaliana, named Pasp-A1, A2 and A3. A1 is identical to a cDNA we had previously isolated and the two others pro-duceproteins 81and63%identical to that predictedprotein. Sequencing of the aspartic proteinase protein purified from Arabidopsisseeds showed that the peptides are derived from two of these genes, A1 and A2.