14 helices containing 117 residues, and 4% beta sheet with 9 strands containing 13 residues.

In 2018 the X-ray crystal structure of human calbindin was published (PDB entry 6FIE). There were differences observed between the nuclear magnetic resonance and crystal structure despite 98% sequence identity between the rat and human isoforms. Small angle X-ray scattering indicates that the crystal structure better predicts the properties of calbindin in solution compared with the structure determined by nuclear magnetic resonance.

Calbindin

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