In muscle, parvalbumin is thought to be involved in relaxation after contraction. It binds two calcium ions. The N-terminus is blocked. Causes an allergic reaction in human. Binds to IgE (PubMed:12842183, PubMed:28479332). Binds to IgE in 80% of 5 fish-allergic patients tested (PubMed:12842183). Belongs to the parvalbumin family.