Sequence alignment between 1f45(A) and UniProt seq P29460 (IL12B_HUMAN):

P29460 (IL12B_HUMAN): Interleukin-12 subunit beta from Homo sapiens 
                 10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220       230       240       250       260       270       280       290       300       310       320        
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+--------
UniProt: MCHQQLVISWFSLVFLASPLVAIWELKKDVYVVELDWYPDAPGEMVVLTCDTPEEDGITWTLDQSSEVLGSGKTLTIQVKEFGDAGQYTCHKGGEVLSHSLLLLHKKEDGIWSTDILKDQKEPKNKTFLRCEAKNYSGRFTCWWLTTISTDLTFSVKSSRGSSDPQGVTCGAATLSAERVRGDNKEYEYSVECQEDSACPAAEESLPIEVMVDAVHKLKYENYTSSFFIRDIIKPDPPKNLQLKPLKNSRQVEVSWEYPDTWSTPHSYFSLTFCVQVQGKSKREKKDRVFTDKTSATVICRKNASISVRAQDRYYSSSWSEWASVPCS
         ..........................................................................................XXXXXXX.................................................................................XXXXXXX.............................................................................................XXXXXXX................XXX........................
PDB seq: ----------------------IWELKKDVYVVELDWYPDAPGEMVVLTCDTPEEDGITWTLDQSSEVLGSGKTLTIQVKEFGDAGQYTC-------SHSLLLLHKKEDGIWSTDILKDQKEPKNKTFLRCEAKNYSGRFTCWWLTTISTDLTFSVKSSRGSSDPQGVTCGAATLSAE-------EYEYSVECQEDSACPAAEESLPIEVMVDAVHKLKYENYTSSFFIRDIIKPDPPKNLQLKPLKNSRQVEVSWEYPDTWSTPHSYFSLTFCVQVQ-------KDRVFTDKTSATVICR---SISVRAQDRYYSSSWSEWASVPCS
                               ---------+---------+---------+---------+---------+---------+--------       ----+---------+---------+---------+---------+---------+---------+---------+------       ------+---------+---------+---------+---------+---------+---------+---------+---------+------       ------+---------   -------+---------+------
                                       10        20        30        40        50        60                  80        90       100       110       120       130       140       150                 170       180       190       200       210       220       230       240       250                 270                 290       300