. "From the insectivorous plants Nepenthes sp. (secretions) and Drosera peltata (ground-up leaves)." . "Aspartic endopeptidases are probably present in many other plants, including lotus and sorghum." . . . "Nepenthes aspartic proteinase" . "Nepenthesin" . . "Similar to pepsin, but also cleaves on either side of Asp and at Lys-|-Arg." .