dimer: subunits are made of two EF-hands

5 helices, two EF-hands plus one of additional helices in the N-terminal part

Duplication: made with two pairs of EF-hands

6-helices, array of 3 hairpins, closed made with two-helical hairpin and two EF-hands

PF05517, comprises two degenerate EF-hands and extra C-terminal helix, packed agains the bundle end

4 EF-hands assembled in a compact structure like the Penta-EF-hand proteins, contains additional N-terminal all-alpha subdomain

calcium-binding pollen allergen, two EF-hands per subunit

PF03556