heme
Noun
Meaning
a complex red organic pigment containing iron and other atoms to which oxygen binds
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As absence of iron decreases heme synthesis, red blood cells in iron deficiency anemia are hypochromic (lacking the red hemoglobin pigment) and microcytic (smaller than normal).
Each subunit is composed of a protein chain tightly associated with a non-protein heme group.
CO competes with oxygen at the heme binding site.
Each heme group contains one iron atom, that can bind one oxygen molecule through ion -induced dipole forces.
Each molecule has four heme groups, and their interaction with various molecules alters the exact color.
Free cytotoxic heme accumulates in the parasites, causing their deaths.