Sequence alignment between 1e2b(A) and UniProt seq P69795 (PTQB_ECOLI):

P69795 (PTQB_ECOLI): PTS system N,N'-diacetylchitobiose-specific EIIB component from Escherichia coli (strain K12) 
                 10        20        30        40        50        60        70        80        90       100      
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+------
UniProt: MEKKHIYLFCSAGMSTSLLVSKMRAQAEKYEVPVIIEAFPETLAGEKGQNADVVLLGPQIAYMLPEIQRLLPNKPVEVIDSLLYGKVDGLGVLKAAVAAIKKAAAN
         .........X................................................................................................
PDB seq: MEKKHIYLFSSAGMSTSLLVSKMRAQAEKYEVPVIIEAFPETLAGEKGQNADVVLLGPQIAYMLPEIQRLLPNKPVEVIDSLLYGKVDGLGVLKAAVAAIKKAAAN
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+------
                 10        20        30        40        50        60        70        80        90       100