| NOUN | substance | hematin, heme, haem, haemitin, protoheme | a complex red organic pigment containing iron and other atoms to which oxygen binds |
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| Meaning | A complex red organic pigment containing iron and other atoms to which oxygen binds. | |
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| Synonyms | heme, haem, haemitin, protoheme | |
| Broader | pigment | dry coloring material (especially a powder to be mixed with a liquid / liquid to produce paint, etc.) |
| Substance of | cytochrome | (biochemistry) a class of hemoprotein whose principal biological function is electron transfer (especially in cellular respiration) |
| hemoglobin, haemoglobin, Hb | A hemoprotein composed of globin and heme that gives red blood cells their characteristic color | |
| myoglobin | A hemoprotein that receives oxygen from hemoglobin and stores it in the tissues until needed | |
| Spanish | haemitin, hematina, heme, hemo, protoheme | |
| Catalan | haemitin, hematina, heme, hemo, protoheme | |
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