Sequence alignment between 4zs7(A) and UniProt seq P05231 (IL6_HUMAN):

P05231 (IL6_HUMAN): Interleukin-6 from Homo sapiens
                 10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210  
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+--
UniProt: MNSFSTSAFGPVAFSLGLLLVLPAAFPAPVPPGEDSKDVAAPHRQPLTSSERIDKQIRYILDGISALRKETCNKSNMCESSKEALAENNLNLPKMAEKDGCFQSGFNEETCLVKIITGLLEFEVYLEYLQNRFESSEEQARAVQMSTKVLIQFLQKKAKNLDAITTPDPTTNASLLTKLQAQNQWLQDMTTHLILRSFKEFLQSSLRALRQM
         ............................................................................XXXXXXXXXXXXXX........................................................................XXXXX.............XXXX............................
PDB seq: --------------------------------------------------ERIDKQIRYILDGISALRKETCNKSN--------------NLPKMAEKDGCFQSGFNEETCLVKIITGLLEFEVYLEYLQNRFESSEEQARAVQMSTKVLIQFLQKKAKNLD-----DPTTNASLLTKLQ----WLQDMTTHLILRSFKEFLQSSLRALRQM
                                                           -------+---------+--------              -------+---------+---------+---------+---------+---------+---------+----     +---------+--    ---+---------+---------+----
                                                                 30        40                            70        80        90       100       110       120       130       140       150       160       170       180