Sequence alignment between 4ib3(S) and UniProt seq P61925 (IPKA_HUMAN):

P61925 (IPKA_HUMAN): cAMP-dependent protein kinase inhibitor alpha from Homo sapiens
                 10        20        30        40        50        60        70      
         ---------+---------+---------+---------+---------+---------+---------+------
UniProt: MTDVETTYADFIASGRTGRRNAIHDILVSSASGNSNELALKLAGLDINKTEGEEDAQRSSTEQSGEAQGEAAKSES
         ....................XX......................................................
PDB seq: -----TTYADFIASGRTGRRASIHD---------------------------------------------------
              -----+---------+----                                                   
                 610       620