title: Protein hydrolysate from visceral waste proteins of Catla (Catla catla): optimization of hydrolysis conditions for a commercial neutral protease.
abstract: Protein hydrolysate was prepared from visceral waste proteins of an Indian freshwater major carp, Catla catla. Hydrolysis conditions (viz., time, temperature and enzyme to substrate level) for preparing protein hydrolysates from the fish visceral waste proteins using in situ pH of the visceral mass were optimized by response surface methodology (RSM) by employing a factorial design. The regression coefficient close to 1.0, observed during both experimental and validation runs, indicated the validity of prediction model. An enzyme to substrate level of 1.25 % (v/w), temperature of 55 degrees C and a hydrolysis time of 165 min were found to be the optimum conditions to obtain a higher degree of hydrolysis of >48% using multifect-neutral. The amino acid composition of the protein hydrolysate prepared using the optimized conditions revealed that the protein hydrolysate was similar to FAO/WHO reference protein. The chemical scores computed indicated methionine to be the most limiting amino acid. The protein hydrolysate has the potential for application as an ingredient in balanced fish diets.
authors.affiliation: Department of Meat, Fish and Poultry Technology, Central Food Technological Research Institute, Mysore 570 020, Karnataka, India.
authors.forename: N
authors.initials: N
authors.lastname: Bhaskar
authors.forename: N S
authors.initials: NS
authors.lastname: Mahendrakar
mesh_terms: D000596:Amino Acids / Q000737:chemistry; D000818:Animals; D001709:Biotechnology / Q000379:methods*; D002347:Carps; D029941:Fish Proteins / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis; D008715:Methionine / Q000378:metabolism; D008956:Models, Chemical; D010447:Peptide Hydrolases / Q000737:chemistry*; D011492:Protein Hydrolysates / Q000737:chemistry*; D012015:Reference Standards; D013696:Temperature; D013997:Time Factors; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D000596:Amino Acids; D029941:Fish Proteins; D011492:Protein Hydrolysates; D014874:Water Pollutants, Chemical; D008715:Methionine; D010447:Peptide Hydrolases