Immunoglobulin G1, anti-(human C-C chemokine receptor type 4 (CCR4, K5-5, CD194)); humanized mouse monoclonal KW-0761 gamma1 heavy chain (222-219')-disulfide with humanized mouse monoclonal KW-0761 kappa light chain, dimer (228-228'':231-231'')- bisdisulfide