释义 |
protoporphyrinenUK
pro·to·por·phy·rin P0618100 (prō′tō-pôr′fə-rĭn)n. A metal-free porphyrin, C34H34N4O4, that combines with ferrous iron to form the heme group in hemoglobin and myoglobin, and with ferric iron to form the hemin group in catalase and some cytochromes.protoporphyrin (ˌprəʊtəʊˈpɔːfɪrɪn) n (Biochemistry) a type of porphyrin that, when combined with an iron atom, forms haem, the oxygen-bearing prosthetic group of the red blood pigment haemoglobin
protoporphyrinenUK
protoporphyrin [pro″to-por´fĭ-rin] a porphyrin whose iron complex united with protein occurs in hemoglobin, myoglobin, and certain respiratory pigments. It is accumulated and excreted excessively in the feces in erythropoietic protoporphyria and variegate porphyria.protoporphyrin (prō′tō-pôr′fə-rĭn)n. A metal-free porphyrin, C34H34N4O4, that combines with ferrous iron to form the heme group in hemoglobin and myoglobin, and with ferric iron to form the hemin group in catalase and some cytochromes.protoporphyrin A porphyrin occurring in the course of the synthesis of HAEMOGLOBIN. Excess of this porphyrin, protoporphyria, causes intense itching, swelling and redness of the skin on exposure to sunlight and leads to a strikingly weatherbeaten appearance.ProtoporphyrinA precursor molecule to the porphyrin molecule.Mentioned in: Porphyrias |