title: Characterization and immunocytochemical application of monoclonal antibodies against enkephalins.
abstract: Monoclonal antibodies were produced following immunization of mice with either [Leu5]enkephalin-bovine serum albumin or [Met5]enkephalin-keyhold limpet hemocyanin conjugates. Two monoclonal antibodies coded NOC1 and NOC2, respectively, were derived. These monoclonal antibodies did not discriminate between Leu- and Met-enkephalin in either radioimmunoassay or immunocytochemistry. NOC1 was characterized in detail. In radioimmunoassay NOC1 displayed about 40% crossreactivity with C-terminal extended Met-enkephalin hexapeptides and 7% with the extended heptapeptide (-Arg-Phe-OH), but did not recognize other endogenous peptides. In immunocytochemistry the NOC1 and NOC2 recognized all well-established "enkephalin immunoreactive sites," but they did not bind to areas known to contain beta-endorphin or high levels of pro-enkephalin. NOC1 was shown to be a suitable tool to demonstrate enkephalin immunoreactive sites by radioimmunocytochemistry utilizing both internally and externally labeled monoclonal antibodies.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D000911:Antibodies, Monoclonal; D000936:Antigen-Antibody Complex; D001923:Brain Chemistry; D001933:Brain Stem / Q000473:pathology; D003429:Cross Reactions; D004723:Endorphins / Q000032:analysis; D004743:Enkephalin, Leucine / Q000032:analysis; D004744:Enkephalin, Methionine / Q000032:analysis; D004745:Enkephalins / Q000032:analysis*; D006801:Humans; D007124:Immunoenzyme Techniques; D051379:Mice; D008807:Mice, Inbred BALB C; D011863:Radioimmunoassay; D051381:Rats; D011919:Rats, Inbred Strains; D013329:Structure-Activity Relationship; D001615:beta-Endorphin
chemical_list: D000911:Antibodies, Monoclonal; D000936:Antigen-Antibody Complex; D004723:Endorphins; D004745:Enkephalins; D004744:Enkephalin, Methionine; D004743:Enkephalin, Leucine; D001615:beta-Endorphin