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Non-muscle myosin II (NM II) structure. NM II is a hexamer composed by two non-muscle heavy chains (NMHC IIs) of 230 kDa, two regulatory light chains (RLCs) of 20 kDa, and two essential light chains (ELCs) of 17 kDa. NM II complex consists of three regions: motor domain, neck domain, and tail domain (α-helical coiled-coil that terminates in a non-helical tailpiece, NHT).
