Patent ID: 8226950

Claim:
A humanized recombinant antibody molecule, or an alpha4-binding fragment thereof, comprising: at least one antibody heavy chain, or an α4-binding fragment thereof, comprising non-human CDRs at positions 31-35 (CDR1), 50-65 (CDR2) and 95-102 (CDR3) (Kabat numbering) from a mouse anti-α4 antibody and framework regions from a humanized heavy chain variable region based on the HP1/2 heavy chain variable region (SEQ ID NO: 6); and at least one antibody light chain, or an α4-binding fragment thereof, comprising non-human CDRs at positions 24-34 (CDR1), 50-56 (CDR2) and 89-97 (CDR3) from a mouse anti-α4 antibody and framework regions from a humanized light chain variable region based on the HP1/2 light chain variable region (SEQ ID NO: 10), wherein said HP1/2 framework regions have non-human residues at framework positions 60 and 67.