Sequence alignment between 2ec6(C) and UniProt seq Q26066 (Q26066_PLAMG):

Q26066 (Q26066_PLAMG): Myosin essential light chain from Placopecten magellanicus
                 10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+-------
UniProt: MPKLSQDEIDDLKEVFELFDFWDGRDGAVDAFKIGDVCRCLGINPRNEDVFAVGGTHKMGEKSLPFEEFLPAYEGLMDCEQGTYADYMEAFKTFDREGQGFISGAELRHVLSGLGERLSDEEVDEIINLTDLQEDLEGNVKYEEFVKKVMTGPYPDK
         .............X...................X.................................................X..................................................................X......
PDB seq: -PKLSQDEIDDLKDVFELFDFWDGRDGAVDAFKLGDVCRCLGINPRNEDVFAVGGTHKMGEKSLPFEEFLPAYEGLMDCEQGTFADYMEAFKTFDREGQGFISGAELRHVLSGLGERLSDEEVDEIINLTDLQEDLEGNVKYEEFVKKVMAGPYPD-
          --------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+------ 
                 10        20        30        40        50        60        70        80        90       100       110       120       130       140       150