noun[mass noun] Biochemistry
A red protein containing haem, which carries and stores oxygen in muscle cells. It is structurally similar to a subunit of haemoglobin.
- The heme of another protein, myoglobin, carries oxygen within muscle cells.
- The key, she believes, may be the iron content of the blood and muscle proteins hemoglobin and myoglobin.
- The blood protein hemoglobin and its relative, myoglobin, carry and store life-giving oxygen in many animals.
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