Sequence alignment between 2k4z(A) and UniProt seq Q9F299 (Q9F299_ALLVI):

Q9F299 (Q9F299_ALLVI): DsrR from Allochromatium vinosum
                                      10        20        30        40        50        60        70        80        90       100    
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+----
UniProt: ---------------------MFKLTPAAAEQVLKAAKQGGTEGMCLRLAAGRNPDGSIDYRMGFDDLTEDDIRLTSEGVEIVIAPDYVSLLDQTTLDYVELEPGQFHFIFLNPRDPTYRPPSGG
PDB seq: MGSSHHHHHHSSGLVPRGSHMMFKLTPAAAEQVLKAAKQGGTEGMCLRLAAGRNPDGSIDYRMGFDDLTEDDIRLTSEGVEIVIAPDYVSLLDQTTLDYVELEPGQFHFIFLNPRDPTYRPPSGG
         ----------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+----
                 -10         0        10        20        30        40        50        60        70        80        90       100