Sequence alignment between 1pfh(A) and UniProt seq P0AA04 (PTHP_ECOLI):

P0AA04 (PTHP_ECOLI): Phosphocarrier protein HPr from Escherichia coli (strain K12)
                 10        20        30        40        50        60        70        80     
         ---------+---------+---------+---------+---------+---------+---------+---------+-----
UniProt: MFQQEVTITAPNGLHTRPAAQFVKEAKGFTSEITVTSNGKSASAKSLFKLQTLGLTQGTVVTISAEGEDEQKAVEHLVKLMAELE
         ..............X......................................................................
PDB seq: MFQQEVTITAPNGLXTRPAAQFVKEAKGFTSEITVTSNGKSASAKSLFKLQTLGLTQGTVVTISAEGEDEQKAVEHLVKLMAELE
         ---------+---------+---------+---------+---------+---------+---------+---------+-----
                 10        20        30        40        50        60        70        80