In a precipitin reaction,an excess of antigen over an antibody will lead to:

Question

Quizplus · Accepted Answer

In a precipitin reaction, when there is an excess of antigen, all the antibody binding sites become saturated with antigen molecules, but there may not be enough antibody molecules to cross-link the antigens into a visible precipitate. This results in all antibody sites being bound by antigen but no formation of precipitate because the necessary lattice structure for precipitate formation cannot be formed.

In a Precipitin Reaction,an Excess of Antigen Over an Antibody