【摘 要】
：
To search for an alternative to using protein conjugated aflatoxin as a coating antigen in aflatoxin detection by an ELISA method, a random-8-peptide librar
【机 构】
：
Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences,Wuhan 430062,P.R.China
【出 处】
：
中国作物学会油料作物专业委员会第七次会员代表大会暨学术年会
论文部分内容阅读
To search for an alternative to using protein conjugated aflatoxin as a coating antigen in aflatoxin detection by an ELISA method, a random-8-peptide library was constructed and used as a source of peptides that mimic aflatoxins (termed as mimotopes).Five mimotope peptides were obtained by panning-elution from the library and were successfully used in an indirect competitive ELISA for analyzing total aflatoxin concentration.The assay exhibited an IC50 value of 14 μg/kg in samples (with 1 in 7 dilution of sample extract) for aflatoxins.The linear range is 4-24μg/kg.Further validation indicated relatively good recovery (60-120%) in peanut, rice and corn.Natural contaminated samples (peanut and feedstuff) were analyzed for aflatoxin concentration by both conventional EL1SA and phage ELISA.The results showed good correlation.It can be concluded that the mimotope preparation is an effective substitute for the aflatoxin based coating antigen in ELISA and can be used in real sample analysis.
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