Sequence alignment between 4do2(A) and UniProt seq P03051 (ROP_ECOLX):

P03051 (ROP_ECOLX): Regulatory protein rop from Escherichia coli 
                 10        20        30        40        50        60   
         ---------+---------+---------+---------+---------+---------+---
UniProt: MTKQEKTALNMARFIRSQTLTLLEKLNELDADEQADICESLHDHADELYRSCLARFGDDGENL
         .............................XX................................
PDB seq: MTKQEKTALNMARFIRSQTLTLLEKLNELPGDEQADICESLHDHADELYRSCLARFG------
         ---------+---------+---------+---------+---------+-------      
                 10        20        30        40        50