her. poly-many ??? ??? ??? Hemoglobin iron-containing protein in red blood cells that transports oxygen from the lungs to the tissues of the body. hemo-blood, globin- globular protein ??? ??? ??? Denaturation the change in a protein's shape and consequent loss of its function brought about by heat, agitation, acid, base, alcohol, heavy metals, or other agents. ??? ??? ??? Proenzyme inactive enzyme