The Laws of Virus-Antibody Interactions in vitro The Laws of Antigen-Antibody Interactions in vitro Viggo Bitsch viggo. bitsch @gmail.com The Characteristics of the in vitro Antigen-Antibody Interactions 1. 1. Antibodies are regularly bound firmly and irreversibly to their antigenic determinants under physiological conditions. 2. 2. The binding force is so far unknown , as is also the force binding the hexavalent complement component C1q to the Fc fragment of antibodies sensitized for that binding by being bound to their antigenic determinant (see below). The force binding antigens and antibodies is highly specific . 3. 3. The function of the two distinct binding forces is magnetism-like, meaning that, within a certain range, related binding sites are attracted to each other and subsequently bound firmly. 4. 4. The ntibodies are flexible molecules, and their attractive binding forces wi...