Sequence alignment between 3sic(I) and UniProt seq P01006 (SSI_STRAO):

P01006 (SSI_STRAO): Subtilisin inhibitor from Streptomyces albogriseolus
                 10        20        30        40        50        60        70        80        90       100       110       120       130       140    
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+----
UniProt: MRNTGAGPSPSVSRPPPSAAPLSGAALAAPGDAPSALYAPSALVLTVGKGVSATTAAPERAVTLTCAPGPSGTHPAAGSACADLAAVGGDLNALTRGEDVMCPMVYDPVLLTVDGVWQGKRVSYERVFSNECEMNAHGSSVFAF
         .......................................................................................................X........................................
PDB seq: -------------------------------------YAPSALVLTVGKGVSATTAAPERAVTLTCAPGPSGTHPAAGSACADLAAVGGDLNALTRGEDVMCPKVYDPVLLTVDGVWQGKRVSYERVFSNECEMNAHGSSVFAF
                                              ---+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---
                                                10        20        30        40        50        60        70        80        90       100       110