Sequence alignment between 1f2s(I) and UniProt seq P10295 (ITR2_MOMCH):

P10295 (ITR2_MOMCH): Trypsin inhibitor 2 from Momordica charantia 
                 10        20        
         ---------+---------+--------
UniProt: RICPRIWMECKRDSDCMAQCICVDGHCG
         ..................X....X....
PDB seq: RICPRIWMECKRDSDCMAECICVMGHCG
         ---------+---------+--------
                310       320