Polypeptides capable of forming antigen binding structures specific
for Rhesus D antigens include the sequences indicated in the FIGS. 1a to
16b. The obtained polypeptides, being Fab fragments, MAY be used directly
as an active ingredient in pharmaceutical and diagnostic compositions. The Fab
and their DNA sequences can also be used for the preparation of complete recombinant
Anti-Rhesus D antibodies. Useful in pharmaceutical and diagnostic compostions.