Consider the structure of calmodulin. Identify the correct statements about calmodulin. Calmodulin contains a central, flexible B sheet that enables the protein to wrap around another protein, regulating its activity. Binding of Ca²+ changes the conformation of calmodulin The metal ion in the EF hand of calmodulin is coordinated to seven oxygen atoms. Calmodulin contains two Ca²+ binding sites. The loop of the EF hand contains at least one Asp or Glu residue. Each Ef hand in calmodulin is formed from a helix- loop-helix motif. Calmodulin is a structural subunit of proteins such as CaM kinase II