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Fish protein hydrolyzate is a product obtained from the decomposition of fish proteins into short-chain compounds due to the hydrolysis process either by enzymes, acids, or bases. The purpose of this study was to optimize the production of fish protein hydrolyzate from the low economic value fishes including 'bibisan' (Apogon albimaculosus), 'baji-baji' (Platycephalidae cymbacephalus), and the 'lidah' (Cynoglossus lingua) obtained from Talango Island, Madura. Production of fish protein hydrolyzate was conducted using (Calotropis gigantea) protease at various concentrations (0, 0.7, 1.4, and 2.1 Unit/g) and at various hydrolysis times (0, 1.5, and 3 h). The experimental design was a Completely Randomized Design with two factors and the experiments were carried out in triplicates. The results showed that interactions between protease concentrations and hydrolysis times significantly affected (at 5% level test) the soluble proteins, maillard products, and the level of rancidity measured as thiobarbituric acid (TBA). The best fish hydrolyzate product based on the soluble protein parameter was resulted from 2.1 unit/g of biduri’s protease with a hydrolysis time of 1.5 h. The hydrolyzate produced had 3.51% of soluble proteins, a maillard value of 0.63, and rancidity levels of 12.21 mmol TBA/kg

jurnal teknologi dan industri pangan/jurnal teknologi dan industri pangan (edisi online)

HIDROLISIS IKAN BERNILAI EKONOMI RENDAH SECARA ENZIMATIS MENGGUNAKAN PROTEASE BIDURI [Enzymatic Hydrolysis of Low Economic Value Fishes using Biduri’s Protease]