hemoglobin |
hemerythrin |
As nouns the difference between hemoglobin and hemerythrin
is that
hemoglobin is the iron-containing substance in red blood cells that transports oxygen from the lungs to the rest of the body; it consists of a protein (
globulin), and
haem (a porphyrin ring with an atom of iron at its centre) while
hemerythrin is a respiratory pigment found in sipunculids, priapulids and brachiopods.