Process for the preparation of heterologous bispecific antibodies

摘要

The invention pertains to a method for producing heterologous bispecific antibodies. The object of the invention is a method designed to yield heterologous bispecific antibodies with a high level of purity. This is attained by producing a quadroma fused from hybridomas, one of which produces antibodies that have an affinity to the binding site of protein A and the other of which produces antibodies that have a weaker or no affinity to the binding site of protein A; by propagating and cultivating the quadromas as usual, and by eluting the bsAk in a pH range at least 0.5 units above the pH at which the antibodies with greater affinity to the binding site of protein A are still bonded.