- A human immunoglobulin G1 antibody originating from an in vitro-selected Fab phage antibody binds avidly to tumor-associated MUC1 and is efficiently internalized. Henderikx, P., Coolen-van Neer, N., Jacobs, A., van der Linden, E., Arends, J.W., Müllberg, J., Hoogenboom, H.R. Am. J. Pathol. (2002)