Sequence alignment between 1frt(B) and UniProt seq P07151 (B2MG_RAT):

P07151 (B2MG_RAT): Beta-2-microglobulin from Rattus norvegicus
                 10        20        30        40        50        60        70        80        90       100       110         
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------
UniProt: MARSVTVIFLVLVSLAVVLAIQKTPQIQVYSRHPPENGKPNFLNCYVSQFHPPQIEIELLKNGKKIPNIEMSDLSFSKDWSFYILAHTEFTPTETDVYACRVKHVTLKEPKTVTWDRDM
PDB seq: --------------------IQKTPQIQVYSRHPPENGKPNFLNCYVSQFHPPQIEIELLKNGKKIPNIEMSDLSFSKDWSFYILAHTEFTPTETDVYACRVKHVTLKEPKTVTWDRDM
                             ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------
                                     10        20        30        40        50        60        70        80        90