On page 989, De Wildt et al. demonstrate that arrays can be applied to the high-throughput screening of recombinant antibodies. The authors first selected from a phage display library antibodies that bound to tubes coated with antigen, and then used robotics to array the selected clones onto antigen-coated filters. Binders were detected using a labeled ligand. Using this approach, they were able to select antibodies to even rare components in a bacterial lysate, more effectively than conventional approaches. The arrays will be useful for parallel screening of many different antibodies against different antigens, and for elimination of background and false positives early on in a screening process (see pp. 932 and 989).