Abstract
This paper shows the potential of dual enzyme approach on antioxidant activity of casein hydrolysates. Casein was hydrolysed using the proteolytic enzymes alcalase, flavourzyme in isolation and in sequential order. Casein hydrolysates were evaluated for the degree of hydrolysis, antioxidant activity, molecular weight distribution patterns and peptide sequence. Casein hydrolysate produced by the sequential hydrolysis of alcalase and flavourzyme showed higher degree of hydrolysis and antioxidant activity as compared to hydrolysate obtained by individual enzymes. In size exclusion chromatograph of casein hydrolysate S3, peptides with molecular weight of 0.57 kDa share 12% area in total area of chromatogram which was 10 times higher than that of hydrolysate S1 and nearly half of that of hydrolysate S2. On subjecting to HPLC-TOF-ESI separation potential antioxidant peptides were identified. The peptide sequence VLPVPQ along with potential fragments was identified in hydrolysate S1 and S2 and HPHPHLS along with its potential sequence was identified in hydrolysate S1, S2 and S3. Sequential hydrolysis of casein showed better antioxidant activity and peptide profile in less duration as compared to the casein hydrolysate obtained by individual enzyme.
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Acknowledgements
This work was supported by the SERB-MOFPI Project (SERB/MOFPI/0028/2013), Department of Science and Technology, Govt. of India, New Delhi, India.
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Rao, P.S., Bajaj, R. & Mann, B. Impact of sequential enzymatic hydrolysis on antioxidant activity and peptide profile of casein hydrolysate. J Food Sci Technol 57, 4562–4575 (2020). https://doi.org/10.1007/s13197-020-04495-2
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DOI: https://doi.org/10.1007/s13197-020-04495-2