Phage display substrate enables rapid determination of protease specificity by exposing vast numbers of recombinant peptides to a given protease. Peptides released through specific cleavage are amplified in an expression system. Phage display substrate has been widely exploited and developed further. The number of proteases (from various sources) characterized by this approach testifies to its power. To conserve their advantage over chemical methods, however, phage libraries must be constructed accordingly. The current phenomenal progress in genomics steadily increases the number of protease to be studied. Phage display substrate should prove a powerful method to exploit this wealth of new knowledge.
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