title: Comparison the effect of three commercial enzymes for enzymatic hydrolysis of two substrates (rice bran protein concentrate and soy-been protein) with SDS-PAGE.
abstract: In this research enzymatic hydrolysis of rice bran protein concentrate (RBPC) and soybean Protein (SBP) as control were studied with 3 commercial enzymes (Alcalase®, Papain and acommercial 3-enzyme cocktail containing of 1.6 mg ml(-1) Trypsin, 3.1 mg ml(-1) Chymotrypsin, 1.3 mg ml(-1)Aminopeptidase (SIGMA P7500) and 7.95 mg ml(-1)pronase type XIV (SIGMA P5147) by the pH stat method. The hydrolysis was carried out at temperature of 28 C, 60 min and pH 8.00. Results were showed that RBPC, and SBP had higher Degree hydrolysis (DH %) with Alcalase® enzyme. Alcalase®had stronger capability for hydrolysis compared to the other tested enzymes. After 60 minute of hydrolysis time, the DH% of Alcalase® for RBPC and SBP was 12.69 and 12.50 %, respectively. In contrast, papain enzyme was showed lowest DH% in three substrates that 1.56 and 1.24 % were for SBP and RBPC, respectively.The hydrolysis of the protein fraction performed the three enzymes on the two substrates was followed in SDS-PAGE. RBPC and SBP showed almost complete digestion with Alcalase® enzyme after 60 minutes. 3-enzyme cocktail enzyme hydrolyzed better the RBPC than the SBP. Papain enzyme had less effect on the two substrates than other 2 enzymes. It was found that Alcalase® has highest capability for hydrolysis compared to other enzyme preparations. The high value protein hydrolysates prepared by Alcalase® can be used as value added ingredients in many food formulations. They are also suitable for a broad range of industrial food applications and also for cosmetic and personal care products.
authors.affiliation: Fisheries Department, Faculty of Natural Resources, Urmia University, P.O. Box: 57153-165, Urmia, Iran.
authors.forename: Nasrollah
authors.initials: N
authors.lastname: Ahmadifard
authors.affiliation: Centro de Investigaciones Biológicas del Noroeste (CIBNOR), B.C.S. 23090 La Paz, Mexico.
authors.forename: Julio Humberto Cordova
authors.initials: JH
authors.lastname: Murueta
authors.affiliation: Aquaculture Department, Faculty of Marine Science, TarbiatModares University, P.O. Box: 46414-356, Noor, Mazandaran Iran.
authors.forename: Abdolmohammad
authors.initials: A
authors.lastname: Abedian-Kenari
authors.affiliation: Food Science Department, University of Natural Resources and Agriculture, P.O. Box: 578, Sarii, Mazandaran Iran.
authors.forename: Ali
authors.initials: A
authors.lastname: Motamedzadegan
authors.affiliation: Fisheries Department, Faculty of Natural Resources, Urmia University, P.O. Box: 57153-165, Urmia, Iran.
authors.forename: Hadi
authors.initials: H
authors.lastname: Jamali
keywords: Commercial enzyme; Enzymatic hydrolysis; Rice bran protein concentrate; SDS-PAGE