منابع مشابه
Porphyrins and the iron requirement for chlorophyll formation in Euglena.
Although iron has been known to be indispensable for the formation of chlorophyll (11), the mechanism for the iron requirement has not been identified at the level of a chemical or enzymic reaction. We report here experiments on the possible involvement of iron in porphyrin metabolism. Pappenheimer (16) found that porphyrins were produced by iron-deficient Corynebacterium diphtheriae. Similarly...
متن کاملCarbon monoxide binding to iron porphyrins.
The carbon monoxide affinities of iron complexes of meso-tetra (alpha, alpha, alpha, alpha-o-pivalamidophenyl)porphyrin (the "picket fence" porphyrin) and of a "picket fence" porphyrin derivative with an appended axial base have been measured in solution and compared with the CO affinities of various hemoproteins. The model complexes bind CO with much greater affinity than normal hemoproteins; ...
متن کاملModel compounds with superoxide dismutase activity: iron porphyrins and other iron complexes [proceedings].
The enzyme superoxide dismutase (EC 1.15.1.1) is essential to aerobic life (Fridovich, 1975; Halliwell, 1978). All superoxide dismutases are metalloproteins, containing manganese, iron or copper and zinc as the prosthetic groups. However, some simple metal complexes also react with the superoxide radical (02-'); for example, complexes of Cu(I1) with amino acids (Brigelius et al., 1974) and comp...
متن کاملNatural chlorophyll-related porphyrins and chlorins for dye-sensitized solar cells.
Natural-chlorophyll-related porphyrins, including (2H, Zn, Cu)-protoporphyrin IX (Por-1) and Zn-mesoporphyrin IX (Por-2), and chlorins, including chlorin e₆ (Chl-1), chlorin e₄ (Chl-2), and rhodin G₇ (Chl-3), have been used in dye-sensitized solar cells (DSSCs). For porphyrin sensitizers that have vinyl groups at the β-positions, zinc coordinated Por-1 gives the highest solar-energy-to-electric...
متن کاملIron Porphyrins as Biomimetical Models for Disperse Azo Dye Oxidation
As ferroporfirinas comerciais cloreto de 5,10,15,20-tetraquis-(4-carboxifenil) porfirinaferro(III), cloreto de 5,10,15,20-tetraquis-(N-metil-4-piridil)porfirinaferro(III) e cloreto de 5,10,15,20-tetraquis-(2,3,4,5,6-pentafluorofenil)porfirinaferro(III) foram investigadas como modelo do citocromo P450 na oxidação dos azo corantes Disperse Black 3 (DB3), Disperse Orange 3 (DO3) e Methyl Yellow (M...
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ژورنال
عنوان ژورنال: Nature
سال: 1963
ISSN: 0028-0836,1476-4687
DOI: 10.1038/198708a0