It might help to give information on what hapten you want to conjugate. The methods depend on the various haptens. Stein Tore Solem In article <38FB241F.12933CB1 at uibk.ac.at>, Ira Skvortsova <Ira.Skvortsova at uibk.ac.at> wrote: > How to conjugate KLH and peptide or hapten? If somebody will answer me > it will be very nice >