What is the structure of hemoglobin and how is oxygen bound to it? hemoglobin is made of two protein subunits. within each subunit, is a heme group made of nitrogen and calcium. the heme groups bind to oxygen. hemoglobin is made of six protein subunits. within each subunit, is a heme group made of hydrogen and iron. the heme groups bind to sulfur. hemoglobin is made of four protein subunits. within each subunit, is a heme group made of nitrogen and iron. the heme groups bind to oxygen.
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What is the structure of hemoglobin and how is oxygen bound to it? hemoglobin is made of two prote...
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