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Trypsin is the most abundant protease in Crustacea. This enzyme was purified from the digestive gland of Penaeus vannamei, revealing three major isoforms (molecular weights 31-32 kDa) and several minor components. Five cDNAs encoding five isoforms of trypsin were detected by two successive screenings of an amplified cDNA library from the digestive gland of P. vannamei. The longest isolated and sequenced...
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