Analysis of Genetically-Modified Soybean and Soybean Sprout by Enzyme-Linked Immunosorbent Assay (ELISA)

효소면역측정법을 이용한 유전자재조합 콩과 콩나물의 분석

  • Kwak, Bo-Yeon (Food Function Research Division, Korea Food Research Institute) ;
  • Ko, Seung-Hee (Food Function Research Division, Korea Food Research Institute) ;
  • Shin, Won-Sun (Food Function Research Division, Korea Food Research Institute) ;
  • Shon, Dong-Hwa (Food Function Research Division, Korea Food Research Institute)
  • 곽보연 (한국식품개발연구원 식품기능연구본부) ;
  • 고승희 (한국식품개발연구원 식품기능연구본부) ;
  • 신원선 (한국식품개발연구원 식품기능연구본부) ;
  • 손동화 (한국식품개발연구원 식품기능연구본부)
  • Published : 2003.08.01

Abstract

It was determined whether the sandwich ELISA using specific anti-CP4 EPSPS polyclonal and monoclonal antibodies, developed in the previous study, could be applied to detect GM soybean or not. The soybeans (47 imported and 20 domestic soybeans) were analyzed by a sandwich ELISA. The results of imported soybeans were divided into two groups which were high contents $(39.1{\pm}13.5\;{\mu}g/g,\;n=33)$ and low contents of CP4 EPSPS $(2.6{\pm}1.2\;{\mu}g/g,\;n=14)$. The ratio of GM in imported soybeans was about 70.2%. One the other hand, the contents of CP4 EPSPS in domestic soybeans was very low $(0.9{\pm}0.5\;{\mu}g/g,\;n=20)$ which determined to be non-GM soybeans. In case of soybean sprouts, the contents of CP4 EPSPS in soybean sprouts were different between GM and non-GM soybean sprout. The CP4 EPSPS in cotyledon of GM soybeans sprout was higher than that in root hair. The contents of CP4 EPSPS in soybeans sprout of domestic soybeans were very low. Thus, it was possible to determine that the soybeans sprout was made of GM or non-GM soybeans. Also, PCR experiment showed that the sandwich ELISA was accurate to distinguish the soybeans to be GM or non-GM. These results showed the sandwich ELISA could determine the soybeans were GM or non-GM, rapidly and simply.

CP4 EPSPS에 대한 특이항체(다클론 및 단클론)을 이용하여 확립한 전보의 sandwich ELISA 분석법을 원료 콩의 GMO 분석에 적용가능한 가를 검토하였다. 원료 콩은 수입산 47점, 국산 20점을 분석하였다. 그 결과, 수입산 콩의 CP4 EPSPS 분석치는 크게 두 군으로 나뉘어 높은 군$(39.1{\pm}13.5{\mu}g/g,\;n=33)$과 낮은 군$(2.6{\pm}1.2{\mu}g/g,\;n=14)$으로 나타났다. 수입산 콩의 GMO 비율은 약 70.2%로 나타났다. 한편, 국산 콩의 CP4 EPSPS의 함량 $(0.9{\pm}0.5{\mu}g/g,\;n=20)$은 아주 낮은 것으로 나타났고 이는 non-GMO인 것으로 판단되었다. 콩나물의 경우에 GM과 non-GM 간 CP4 EPSPS의 차이를 보이고 있었고 GM 콩나물의 자엽부에서 뿌리보다 높은 CP4 EPSPS의 함량을 보여주고 있다. 국산 콩으로 만든 콩나물의 경우 CP4 EPSPS의 함량은 아주 낮은 것으로 나타나 GM과 non-GM 콩간의 구분이 가능하였다. 또한 PCR에 의해 sandwich ELISA가 정확하다는 것을 보여주었다. 이상과 같이 sandwich ELISA 방법은 신속, 간편하게 많은 콩 시료의 GMO 여부를 판단할 수 있음을 보여주었다.

Keywords

References

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