depicted in the sequences described above since each of these antibodies can bind to il 13 the v h and v l sequences can be u201c mixed and matched u201d to create other anti il 13 binding molecules of the invention il 13 binding of such u201c mixed and matched u201d antibodies can be tested using the binding assays described above and in the examples e g elisas when v h and v l chains are mixed and matched a v h sequence from a particular v h v l pairing should be replaced with a structurally similar v h sequence likewise a v l sequence from a particular v h v l pairing should be replaced with a structurally similar v l sequence the v h and v l sequences of the antibodies of the present invention are particularly amenable for mixing and matching since these antibodies use v h and v l sequences derived from the same germline sequences and thus exhibit structural similarity in another aspect the invention provides antibodies that comprise the heavy chain and light chain cdr 39 s cdr2s and cdr3s of the antibodies or combinations thereof the amino acid sequences of the v h cdr1s of the antibodies are shown in seq id nos 6 7 the amino acid sequence of the v h cdr2s of the antibodies is shown by seq id no 8 the amino acid sequences of the v h cdr3s of the antibodies are shown in seq id nos 9 10 the amino acid sequences of the v l cdr1s of the antibodies are shown in seq id nos.