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http://dx.doi.org/10.3746/jkfn.2002.31.5.723

Effect of Gamma Irradiation on the Conformational Changes of Garlic (Allium sativum) Protein, Allivin  

김미리 (충남대학교 식품영양학과)
이주운 (한국원자력연구소 방사선식품·생명공학기술개발팀)
변명우 (한국원자력연구소 방사선식품·생명공학기술개발팀)
서지현 (한국원자력연구소 방사선식품·)
육홍선 (충남대학교 식품영양학과)
김미정 (안양대학교 식품영양학과)
Publication Information
Journal of the Korean Society of Food Science and Nutrition / v.31, no.5, 2002 , pp. 723-727 More about this Journal
Abstract
Conformational changes of allivin, a major allergen protein in garlic, by gamma irradiation were observed. Allium solution (3.0 mg/mL in 0.01 M PBS, pH 7.4) and raw garlic were irradiated in a gamma irradiation facility to be absorbed with doses of 2.5, 5.0, 7.5 and 10.0 kGy. After irradiation, a half of irradiated allivin solution was filtered through 0.22 ${\mu}{\textrm}{m}$ filtration kit. UV spectrum and SDS-PAGE were used for observing the conformational changes of allivin by gamma irradiation. Turbidity of allivin solution was increased by optical observation, and the result was validated by the increase of absorbance at 660 m. Turbidity of irradiated and filtered allivin solution significantly (p<0.05) decreased, and the concentration of soluble protein in the solution decreased by increase of the dose. Aggregation among allivin molecules was observed by SDS-PAGE, but irradiated and filtered samples showed decrease of allivin with reducing aggregation trend. SDS-PAGE profiles of irradiated raw garlic were not different. Results indicate that gamma irradiation can decrease the allivin in solution state which may impact on allergenic reaction of garlic.
Keywords
gamma-irradiation; garlic; allivin; UV spectrum; SDS-PAGE;
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