Journal of the Korean Society of Food Science and Nutrition (한국식품영양과학회지)

The Korean Society of Food Science and Nutrition (한국식품영양과학회)
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Effect of Enzymatic Hydrolysis by Proteases on Antioxidant Activity of Chungkukjang

단백질 분해 효소 처리가 청국장의 항산화 활성에 미치는 영향

  • Park, Min-Kyung (Dept. of Human Nutrition and Food Science, Chungwoon University)
  • 박민경 (청운대학교 식품영양학과)
  • Received : 2010.11.15
  • Accepted : 2011.01.24
  • Published : 2011.02.28
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Abstract

Chungkukjang and soybean powder were enzymatically hydrolyzed with 20, 100 and 500 mAU of 3 commercially available proteases (alcalase 2.4L, protamex and neutrase 0.8L) at $50^{\circ}C$ for 120 min. The degree of hydrolysis and antioxidant activities of hydrolysates were comparably evaluated. Alcalase and protamex yielded higher content of peptide compared to neutrase in both Chungkukjang and soybean powder hydrolyzed samples. Both Chungkukjang and soybean hydrolysates showed also greater increases of antioxidant activities compared to those prepared with neutrase. The rates of increment of DPPH, ABTS and hydroxyl radical scavenging activities were similar between Chungkukjang and soybean powder hydrolyzates. These results show that alcalase and protamex are not specific for Chungkukjang but enhance its antioxidant activity.

Alcalase, protamex 및 neutrase 효소처리가 청국장의 펩타이드 및 항산화 활성 증가에 미치는 영향을 동일한 조건으로 효소 처리한 대두분말과 비교하였다. 효소 20, 100 및 500 mAU를 $50^{\circ}C$에서 120분간 처리한 결과 청국장과 대두분말 모두에서 alcalase 및 protamex에 의한 펩타이드 생성이 neutrase보다 높게 나타났다. 항산화 활성은 청국장의 경우 alcalase 처리에 의해 DPPH, ABTS 및 hydroxyl radical 소거활성이 효소처리를 하지 않은 대조구와 비교하여 시료량에 따라 각각 37~57%, 59~106% 및 67~83%, protamex 처리에 의해 35~50%, 56~74% 및 52~75% 통계적으로 유의하게 증가하였다. 대두분말을 효소 처리한 시료에서도 유사한 결과를 보여 alcalase 처리에 의해 DPPH, ABTS 및 hydroxyl radical 소거활성이 각각 37~55%, 51~99% 및 67~83%, protamex 처리에 의해 36~44%, 44~66% 및 51~65% 증가하였다. 그러나 두 시료 모두에서 neutrase 처리에 의한 항산화 활성의 유의적 증가는 없었다. 이상의 결과는 alcalase와 protamex가 청국장에 특이적이지는 않으나 펩타이드 생성 및 항산화 활성 증가에 효율적임을 보여주고 있다.

Keywords

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