MB (Myoglobin) is a 154-amino acid protein (~17kDa), is a member of the globin superfamily and e, Xenopus/Amphibian,pression of myoglobin is highest in skeletal and cardiac muscle. Functionally,Mouse,yoglobin is well accepted as an O2-storage protein in muscle, capable of releasing O2 during periods of hypo, Xenopus/Amphibian,ia or ano, Xenopus/Amphibian,ia. Myoglobin is also thought to buffer intracellular O2 concentration when muscle activity increases and to facilitate intracellular O2 diffusion by providing a parallel path that augments simple diffusion of dissolved O2. Furthermore,Mouse,yoglobin is used together with cTnI or cTnT in clinical practise for better specificity in AMI diagnosis.