Sequence alignment between 2r4r(H) and UniProt seq :

UniProt: 
PDB seq: EVQLQQSGAELARPGASVKLSCKASGYIFTDYYINWVRQRTGQGFEWIGEIYPGSGNIDYNERFKDKATLTADKSSSTAYMQLSSLTSEDSAVYFCVRGFGYWGQGTTLTVSSAKTTPPSVYPLAPGSAAQTNSAVTLGCLVKGYFPEPVTVTWNSGSLSSGVHTFPAVLQSDLYTLSSSVTVPSSTWPSETVTCNVAHPASSTKVDKKIVPRDCGC
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+-------
                 10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210