>BS1-fragment 7fab light chain variable region
TISCTGSSSNIGAGNHVKWYQQLPG
>BS2-fragment 2fb4 light chain variable region
VTISCTGTSSNIGSITVNWYQQLPG
>BS3-fragment 2fb4 heavy chain variable region
LRLSCSSSGFIFSSYAMYWVRQAPG
>BS4-fragment 7fab heavy chain variable region 
LSLTCTVSGTSFDDYYSTWVRQPPG