Hemoglobin cage

A red blood cell contains over 250 million hemoglobin complexes. Hemoglobin is an iron-containing metalloprotein composed of four protein chains containing a ring-like heme group. Hemoglobin transports oxygen from the lungs to the rest of the body by reversibly binding oxygen to the iron in each heme.

colors by beta util.mroll 1, 180, 1 X-RAY DIFFRACTION 1.50 Å BakR d0mains rbc.cage limited 500 eds. only ever minted