Sequence alignment between 4y2d(C) and UniProt seq P01848 (TCA_HUMAN):

P01848 (TCA_HUMAN): T cell receptor alpha chain constant from Homo sapiens
                                                                                                                                   10        20        30        40        50        60        70        80        90       100       110       120       130       140
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+
UniProt: ------------------------------------------------------------------------------------------------------------------IQNPDPAVYQLRDSKSSDKSVCLFTDFDSQTNVSQSKDSDVYITDKTVLDMRSMDFKSNSAVAWSNKSDFACANAFNNSIIPEDTFFPSPESSCDVKLVEKSFETDTNLNFQNLSVIGFRILLLKVAGFNLLMTLRLWSS
         ................................................................................................................................................................X....................X........................................................................
PDB seq: TQVEQSPQSLVVRQGENCVLQCNYSVTPDNHLRWFKQDTGKGLVSLTVLVDQKDKTSNGRYSATLDKDAKHSTLHITATLLDDTATYICVVGDRGSALGRLHFGAGTQLIVIPDIQNPDPAVYQLRDSKSSDKSVCLFTDFDSQTNVSQSKDSDVYITDKCVLDMRSMDFKSNSAVAWSNK-DFACANAFNNSIIPEDTFFPS---------------------------------------------------
         --------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+-- ------+---------+----                                                   
                10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200