• Journal of Microbiology and Biotechnology
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• 제14권4호
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• pp.783-788
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• 2004

Marker proteins of genetically-modified organisms (GMO) and their antibodies were prepared and characterized as major components of an analytical system. We selected two GMO markers, neomycin phosphotransferase II and 5- enolpyruvylshikimate-3-phosphate synthase, and produced them from E. coli employing genetic recombination technology. After purification, their structural conformation and binding affinities to the respective antibodies were characterized. The results showed that the recombinant proteins were identical with commercially obtained reference proteins. We further used them as immunogens to raise polyclonal antibodies capable of discriminating GMO containing protein from non-GMO. Well-characterized marker proteins and antibodies will be valuable as immunoreagents in constructing analytical systems such as biosensors and biochips to measure quantities of GMO.

• 한국생물공학회:학술대회논문집
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• 한국생물공학회 2003년도 생물공학의 동향(XIII)
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• pp.220-222
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• 2003

Legislation enacted worldwide to regulate the content of genetically modified organisms (GMOs) in crops, foods, and ingredients, reliable and sensitive methods for GMO detection have been developed. Proteins produced in GMO plants can be determined by qualitative and quantitative analyses and thus GMO designation has performed exactly. Target proteins selected in this study were neomycin phosphotransferase II (NPTII), 5-enolpyruvylshikimate-3-phosphate synthase (CP4 EPSPS), cucumber mosaic virus(CMV), and phosphinothricin acetyltransferase (PAT). Analytical method employing western blotting was used for final characterization.

• 한국식품과학회지
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• 제52권1호
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• pp.40-45
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• 2020

1996년 이후부터 현재까지 개발된 GM 작물은 520여종에 이르며, 미국, 브라질, 아르헨티나, 캐나다, 인도 등을 포함해 26개국에서 GM 작물을 재배하고 있다. 특히, 제1세대 GM 작물로 구분되는 제초제 내성 GM 작물은 전체 GM 작물의 67%를 차지하며, 그 중 제초제 glufosinate에 내성을 나타내는 pat 또는 bar 유전자를 지닌 작물은 44%를 차지한다. 하지만 GM 작물이 같은 형질을 지녔더라도 유전자의 기원, 식물의 종 및 개발자에 따라 그 유전자의 서열은 매우 가변적이기 때문에 이를 식별하기란 쉽지 않다. 따라서 본 연구에서는 전체 GM 작물의 44%, 국내 승인 GM 작물의 약 53%를 차지하는 제초제 glufosinate 내성 유전자에 특이적이면서도 보편적인 마커를 개발하고자, 여러 GM 작물의 pat 또는 bar 유전자의 DNA 염기서열을 비교하여 PCR 프라이머를 개발하였으며, 이를 GM 작물 표준물질을 사용하여 검증하였다. 정성 및 정량적 PCR 실험을 통해 pat 유전자에 특이적인 PCR 프라이머를 개발하였다. 또한 pat과 bar 유전자를 동시에 검출 할 수 있는 PCR 프라이머도 개발하였으며, 정량적 PCR 분석을 통해 0.1% 함량의 수준까지도 검출 가능함을 확인하였다. 따라서 본 연구의 수행 결과로 확인된 PCR 마커 및 분석법이 향후 GM 작물의 안전한 유통관리 및 GM 식품의 식품 안전관리를 위한 저비용 고효율적 검출방법으로 이용될 수 있을 것이라 생각된다.

• 원예과학기술지
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• 제29권2호
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• pp.123-129
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• 2011

To identify unintended vertical gene-transfer rates from the developed transgenic plants, rapid and unequivocal techniques are needed to identify event-specific markers based on flanking sequences around the transgene and to distinguish zygosity such as homo- and hetero-zygosity. To facilitate evaluation of zygosity, a polymerase chain reaction technique was used to analyze a transgenic pepper line B20 (homozygote), P915 wild type (null zygote), and their F1 hybrids, which were used as transgene contaminated plants. First, we sequenced the 3'-flanking region of the T-DNA (1,277 bp) in the transgenic pepper event B20. Based on sequence information for the 3'- and 5'-flanking region of T-DNA provided in a previous study, a primer pair was designed to amplify full length T-DNA in B20. We successfully amplified the full length T-DNA containing 986 bp from the flanking regions of B20. In addition, a 1,040 bp PCR product, which was where the T-DNA was inserted, was amplified from P915. Finally, both full length T-DNA and the 1,040 bp fragment were simultaneously amplified in the F1 hybrids; P915 ${\times}$ B20, Pungchon ${\times}$ B20, Gumtap ${\times}$ B20. In the present study, we were able to identify zygosity among homozygous transgenic event B20, its wild type P915, and hemizygous F1 hybrids. Therefore, this novel zygosity identification technique, which is based on PCR, can be effectively used to examine gene flow for transgenic pepper event B20.