Human antibodies are a hot topic, and most of the attention has gone to Abgenix Inc.'s technology. But two other public companies - Medarex Inc. (MEDX) and Cambridge Antibody Technology Group plc (LSE:CAT) - also are players, each providing a slightly different way of generating antibodies. The Yuletide announcement that CAT will provide its phage display technology to develop human antibodies to G.D. Searle & Co. served as a reminder that companies will continue to make different choices about which technology serves them best.

Both ABGX (Fremont, Calif.) and MEDX (Annandale, N.J.) use