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Comparison of the SSPs predicted from Cα and Cβ chemical shifts: apo-S100A12 (pink bars) and Zn2+-S100A12 (empty blue bars) (left) and Ca2+-S100A12 (pink bars) and Ca2+,Zn2+-S100A12 (empty blue bars) (right). The secondary structure of the apoprotein and Ca2+-bound protein determined from the crystal structure (PDB entries 2WCF and 1E8A) is displayed at the top: α-helices (blue bars), β-strands (yellow arrows), and loop regions (cyan lines).
