Study on the false positive problem caused by HRP-labeled secondary antibody in detecting heme binding protein
In order to study the false positive problem during detecting heme binding protein with horseradish peroxidase (HRP) as secondary antibody, spinach cytochrome b6f complex (Cyt b6f ) and ferredoxin-NADP+ oxidoreductase (FNR) are used as the test material (the former contains the heme binding protein...
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Hebei University of Science and Technology
2019-06-01
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doaj-a315da84c07c49b9b04f6b2cfee2abaa2020-11-25T01:16:23ZzhoHebei University of Science and TechnologyJournal of Hebei University of Science and Technology1008-15422019-06-0140327327810.7535/hbkd.2019yx03011b201903011Study on the false positive problem caused by HRP-labeled secondary antibody in detecting heme binding proteinYanan ZHANG0Chunxiao ZHANG1Xiaobo CHEN2School of Bioscience and Boiengineering, Hebei University of Science and Technology, Shijiazhuang,Hebei 050018, ChinaSchool of Bioscience and Boiengineering, Hebei University of Science and Technology, Shijiazhuang,Hebei 050018, ChinaSchool of Bioscience and Boiengineering, Hebei University of Science and Technology, Shijiazhuang,Hebei 050018, ChinaIn order to study the false positive problem during detecting heme binding protein with horseradish peroxidase (HRP) as secondary antibody, spinach cytochrome b6f complex (Cyt b6f ) and ferredoxin-NADP+ oxidoreductase (FNR) are used as the test material (the former contains the heme binding protein Cyt f, and the latter does not contain heme group). A comparative experiment is designed through the use of the primary antibody of spinach FNR and secondary antibodies labeled with HRP and alkaline phosphatase (ALP). The results indicate that in the HRP-labeled secondary antibody system, Cyt f could be colored even without the incubation by the primary antibody and the secondary antibody, which is a significant false positive. In the ALP-labeled secondary antibody system, the Cyt f doesn't show color, and only the FNR is colored. In western blot experiments, if the protein to be detected is a heme-binding protein or contains a small amount of heme-binding protein, HRP-labeled secondary antibodies should be avoided and ALP-labeled secondary antibodies or other secondary antibodies should be recommended. It is speculated that the heme-binding protein has an HRP-like oxidoreductase activity, namely it can react with the color developing solution, thereby generating a false positive and interfering with the judgment of the experimental results.http://xuebao.hebust.edu.cn/hbkjdx/ch/reader/create_pdf.aspx?file_no=b201903011&flag=1&journal_plant biochemistrywestern blothorseradish peroxidaseheme binding proteinfalse positive |
collection |
DOAJ |
language |
zho |
format |
Article |
sources |
DOAJ |
author |
Yanan ZHANG Chunxiao ZHANG Xiaobo CHEN |
spellingShingle |
Yanan ZHANG Chunxiao ZHANG Xiaobo CHEN Study on the false positive problem caused by HRP-labeled secondary antibody in detecting heme binding protein Journal of Hebei University of Science and Technology plant biochemistry western blot horseradish peroxidase heme binding protein false positive |
author_facet |
Yanan ZHANG Chunxiao ZHANG Xiaobo CHEN |
author_sort |
Yanan ZHANG |
title |
Study on the false positive problem caused by HRP-labeled secondary antibody in detecting heme binding protein |
title_short |
Study on the false positive problem caused by HRP-labeled secondary antibody in detecting heme binding protein |
title_full |
Study on the false positive problem caused by HRP-labeled secondary antibody in detecting heme binding protein |
title_fullStr |
Study on the false positive problem caused by HRP-labeled secondary antibody in detecting heme binding protein |
title_full_unstemmed |
Study on the false positive problem caused by HRP-labeled secondary antibody in detecting heme binding protein |
title_sort |
study on the false positive problem caused by hrp-labeled secondary antibody in detecting heme binding protein |
publisher |
Hebei University of Science and Technology |
series |
Journal of Hebei University of Science and Technology |
issn |
1008-1542 |
publishDate |
2019-06-01 |
description |
In order to study the false positive problem during detecting heme binding protein with horseradish peroxidase (HRP) as secondary antibody, spinach cytochrome b6f complex (Cyt b6f ) and ferredoxin-NADP+ oxidoreductase (FNR) are used as the test material (the former contains the heme binding protein Cyt f, and the latter does not contain heme group). A comparative experiment is designed through the use of the primary antibody of spinach FNR and secondary antibodies labeled with HRP and alkaline phosphatase (ALP). The results indicate that in the HRP-labeled secondary antibody system, Cyt f could be colored even without the incubation by the primary antibody and the secondary antibody, which is a significant false positive. In the ALP-labeled secondary antibody system, the Cyt f doesn't show color, and only the FNR is colored. In western blot experiments, if the protein to be detected is a heme-binding protein or contains a small amount of heme-binding protein, HRP-labeled secondary antibodies should be avoided and ALP-labeled secondary antibodies or other secondary antibodies should be recommended. It is speculated that the heme-binding protein has an HRP-like oxidoreductase activity, namely it can react with the color developing solution, thereby generating a false positive and interfering with the judgment of the experimental results. |
topic |
plant biochemistry western blot horseradish peroxidase heme binding protein false positive |
url |
http://xuebao.hebust.edu.cn/hbkjdx/ch/reader/create_pdf.aspx?file_no=b201903011&flag=1&journal_ |
work_keys_str_mv |
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