porphyrin molecular structure isolated black |
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navigate by keyword : atom background biochemistry black blood carbon cell chemical chemistry component cytochrome drug erythrocyte formula heme hemoglobin illustration iron isolated medical model molecular molecule myoglobin nitrogen organic oxygen porphyrin protein ring structure substance transport treatment |
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Porphyrins are a group of heterocyclic macrocycle organic compounds, composed of four modified pyrrole subunits interconnected at their alpha carbon atoms via methine bridges. 3d illustration |
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