Myoglobin is a cytoplasmic, single chain polypeptide of 153aa. It contains a single heme group. Myoglobin is found in skeletal and carciac muscle. It is not in smooth muscle. it functions as an oxygen transporting pigment. Upon damage to the muscle cell due to infarction of a coronary artery, neurological trauma, infection of tumor processes, myoglobin escapes to the environment and can be found in plasma using sensitive assays. Myoglobin Antigen from human heart tissue. Storage and Stability: May be stored at 4C. For long-term storage, aliquot and store at 4C. Do not freeze. Aliquots are stable for 6 months after receipt. For maximum recovery of product, centrifuge the original vial prior to removing the cap. Further dilutions can be made in assay buffer.