Sequence alignment between 1dfl(Y) and UniProt seq P13543 (MLR_ARGIR):

P13543 (MLR_ARGIR): Myosin regulatory light chain, striated adductor muscle from Argopecten irradians
                 10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+-------
UniProt: MADKAASGVLTKLPQKQIQEMKEAFSMIDVDRDGFVSKEDIKAISEQLGRAPDDKELTAMLKEAPGPLNFTMFLSIFSDKLSGTDSEETIRNAFAMFDEQETKKLNIEYIKDLLENMGDNFNKDEMRMTFKEAPVEGGKFDYVKFTAMIKGSGEEEA
PDB seq: ---------------KQIQEMKEAFSMIDVDRDGFVSKEDIKAISEQLGRAPDDKELTAMLKEAPGPLNFTMFLSIFSDKLSGTDSEETIRNAFAMFDEQETKKLNIEYIKDLLENMGDNFNKDEMRMTFKEAPVEGGKFDYVKFTAMIKG------
                        -----+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+      
                            20        30        40        50        60        70        80        90       100       110       120       130       140       150