A method of screening is provided. In certain embodiments, the method involves a) obtaining the nucleotide sequences of: i. a heavy chain-encoding nucleic acid that encodes the variable domain of a heavy chain of a first antibody of an animal; and ii. a light chain-encoding nucleic acid that encodes the variable domain of a light chain of the first antibody; b) obtaining nucleotide sequences of cDNAs encoding at least a portion of the antibody repertoire of the animal; c) computationally screening the sequences obtained in b) to identify heavy and light chain sequences that are related by lineage to the heavy and light chain sequences of a); and d) testing at least one pair of the heavy and light chain sequences identified in c) to identify a second antibody that binds to the same antigen as the first antibody.