Cytoglobin (Cygb) is a recently new member of globin family in vertebrate. The three other types of globins have been known such as hemoglobin (Hb), which transports oxygen in erythrocytes; myoglobin (Mb) which transports and stores oxygen in muscle tissue; and neuroglobin (Ngb) which is found in nerve tissue with function remain not well understood. The structure of Cygb showed similarities wi…