Method for the immunological identification or determination of polypeptide antigens

摘要

Immunoassay for identification or determination of a specific polypeptide antigen X (I) in a sample comprises treating the sample in vitro with≥1 agent (II) which reacts with the epsilon -amino function of a lysine residue or with the alpha -amino residue of a peptide to couple a residue of (II) with (I) and form modified (I), i.e. polypeptide antigen Xm (I'). The immunoassay for the presence of (I) in the sample is then carried out using≥1 antibody (III) specific for (I') but not specific for the modification itself. (III) is produced by immunisation against a polypeptide antigen Y (IV) identical with (I') or its antigenic fragment. Also claimed are:(a) hybridomas producing anti-ACTH monoclonal antibodies acylated by succinic anhydride, deposited at the CNCM on 12.12.95 under the numbers 1-1648, 1-1649 and 1-1650, and(b) the acylated anti-ACTH monoclonal antibodies produced by the hybridomas as in (a).