Antibodies immunoreactive with formalin-fixed tissue antigens recognize linear protein epitopes
Antibodies immunoreactive with formalin-fixed tissue antigens recognize linear protein epitopes
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DOI：
10.1309/6h0arqf7k3y608eh
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发表时间：
2006-01-01
影响因子：
3.5
通讯作者：
Bogen, SA
中科院分区：
文献类型：
--
作者：
Sompuram, SR;Vani, K;Bogen, SA
It is not clearly understood why some monoclonal antibodies bind to their antigens in formalin-fixed, paraffin-embedded tissue sections but others do not. To address this question, we analyzed the protein epitopes of 9 monoclonal antibodies that are immunoreactive after formalin fixation and antigen retrieval. We identified the antibody contact sites by using phage display and synthesized corresponding peptides derived from the GenBank database sequence that contain the predicted antibody binding sites. Our data indicate that all 9 antibodies bind to linear epitopes, ie, composed of contiguous amino acids. In addition, the amino acids proline, tyrosine, glutamine, and leucine are highly represented in these antibody contact sites. The epitopes tend to be mildly to moderately hydrophilic. These findings are the first detailed studies of antibody epitopes associated with antigen retrieval and suggest that antibodies must recognize linear sequences to bind after formalin fixation and antigen retrieval.
