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The existence of a diverse trypsin gene family with a main role in the proteolytic digestion process has been proved in vertebrate and invertebrate organisms. In lepidopteran insects, a diversity of trypsin-like genes expressed in midgut has also been identified. Genomic DNA and cDNA trypsin-like sequences expressed in the Mediterranean corn Borer (MCB), Sesamia nonagrioides, midgut are reported in...