Interestingly , the molecule does not display a square or tetrahedron structure , but is formed of two lobes , each carrying two EF - hand domains .
Its structure presents four EF - hand domains , each one binding one calcium ion .
The molecule does not display a square or tetrahedron structure , but is formed of two lobes , each carrying two EF - hand domains .
Its structure presents four EF - hand domains , each one binding one calcium ion .