Sequence alignment between 6qb4(X) and UniProt seq :

UniProt: 
PDB seq: QVTLKESGGGLVKPGGSLRLSCAASGFTFSSYSMNWVRQAPGKGLEWVSSISSSSSYIYYADSVKGRFTISRDNAKNSLYLQMNSLRAEDTAVYYCARQVGATWAFDIWGQGTLVTVSQSVLTQPPSASGTPGQRVTISCSGSSSNIGSNTVNWYQQLPGTAPKLLIYSNNQRPSGVPDRFSGSKSGTSASLAISGLQSEDEADYYCAAWDDSLNAWVFGGGTKLTVLGAA
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+------------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+--------
                 10        20        30        40        50        60        70        80        90       100       110          140       150       160       170       180       190       200       210       220       230       240