Sequence alignment between 3ru4(B) and UniProt seq P17734 (IBB_VIGUN):

P17734 (IBB_VIGUN): Bowman-Birk type seed trypsin and chymotrypsin inhibitor from Vigna unguiculata
                 10        20        30        40        50        60        70        80   
         ---------+---------+---------+---------+---------+---------+---------+---------+---
UniProt: SGHHZBSTBZASZSSKPCCRZCACTKSIPPZCRCSZVRLNSCHSACKSCACTFSIPAZCFCGBIBBFCYKPCKSSHSBBBBWN
         ...................XX.X.......X....X.....................X....X.XX.................
PDB seq: -------------SSKPCCDRCECTKSIPPQCRCSDVRLNSCHSACKSCACTFSIPAQCFCGDINDFCYKPCKS---------
                      ------+---------+---------+---------+---------+---------+----         
                           20        30        40        50        60        70