Sequence alignment between 2erl(A) and UniProt seq P10774 (MER1_EUPRA):

P10774 (MER1_EUPRA): Mating pheromone Er-1/Er-3 from Euplotes raikovi 
                 10        20        30        40        50        60        70     
         ---------+---------+---------+---------+---------+---------+---------+-----
UniProt: MNKLAILAIIAMVLFSANAFRFQSRLRSNVEAKTGDACEQAAIQCVESACESLCTEGEDRTGCYMYIYSNCPPYV
PDB seq: -----------------------------------DACEQAAIQCVESACESLCTEGEDRTGCYMYIYSNCPPYV
                                            ---------+---------+---------+---------+
                                                    10        20        30        40