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OJVRTM

Online Journal of Veterinary Research© 

Volume 19(6): 414-423, 2015.


Antimicrobial activity in peptides from enzymatic hydrolysis of goat milk protein

 

Esmaeilpour M1, Ehsani MR1, Aminlari M2,  Shekarforoush S3, Hoseini E1.

 

1Department of Food Science and Technology, Science and Research Branch, Islamic Azad University, Tehran, 2,3School of Veterinary Medicine, Shiraz University, Shiraz, Iran.

 

ABSTRACT

 

Esmaeilpour M, Ehsani MR, Aminlari M, Shekarforoush S, Hoseini E., Antimicrobial activity in peptides from enzymatic hydrolysis of goat milk protein, Onl J Vet Res., 19(6): 414-423, 2015. Goat milk casein and whey proteins were hydrolyzed with trypsin, ficin or both, fractionated by ultrafiltration membranes with cutoffs of 3, 5 and 10 kDa, and purified by RP-HPLC. Peptide fraction of < 3 kDa  from whey protein exhibited 87% activity against E coli and 99% against B. cereus compared with non-hydrolyzed casein and whey protein controls. Greatest activity against E.coli occurred with ficin-hydrolysed protein (MW 3-5 kDa), and with trypsin hydrolysates (MW 3-5 kDa), against B.cereus. Peptide fractions obtained from hydrolysis of whey protein showed higher antimicrobial activity than casein hydrolysates. Peptides present in goat milk or derived from trypsin or ficin hydrolysis may provide antimicrobial alternatives.

 

Key words: Goat milk, bioactive peptide, antimicrobial activity.


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