Left monomer, the residues involved in PTMs in normal heart are shown, i.e. complete trimethylation of cK43118; oxidation of W12, W53 of subunit d192; phosphorylation of αS184, αS419,194 γY52195 and γS121,196 dS30.193 Right monomer, residues involved in PTMs associated with preconditioning or heart failure are shown, i.e. phosphorylation of βS56, βT57, βT212, βS213197; nitration of d Y114 (numbering according to PDB id 4b2q) and hydroxylation of dK71190. Subunit α is also highlighted, being the target of tyrosine nitration187.