The structure of the heme o prosthetic group of Escherichia coli quinol oxidase (cytochrome o oxidase) has been unambiguously determined by preparation and characterization of its iron-free derivative porphyrin o dimethyl ester, or dimethyl 2,7,12,18-tetramethyl-3-[(4E,8E)-1-hydroxy-5,9,13-...
The intimate structure of matter. 物质本质的结构。 This structure is called the heme group. 这一结构叫做血红素基因。 Grammatical structure can also lead to ambiguity. 语法的结构同样会导致歧义。 The structure of the sentence is strange. 这个句子的结构很奇怪。 Do you know the structure of trichord...
The flexible structure of the heme group allows it to exist in various structurally distinct forms depending on the electronic structure of the central Fe ion and on the particular contacts and constraints exercised on the heme by the protein. In studying protein porphyrin iron interactions it is ...
The first is heme iron, which is found only in the flesh of animals. The second is the non-heme iron, which is found in plant-based food. The animals eat plants; therefore, they also consume non-heme iron. The oxidation state of iron metal in the heme group is +2 when it is not...
This structure is called the heme group . 这一结构叫做血红素基因。 The structure is sheltered by a high embankment . 桥被一个高堤挡住了。 Steel structures performed reasonably well . 钢结构的性能相当好。 Nuclear deformations confirm shell structure . 原子核形变证实壳层结构。 It will not encroach...
At 1.75-A resolution, the crystal structure reveals that the antibiotic efficiently blocks the active site of porphobilinogen synthase. The antibiotic binds as a reduced derivative of 5-acetamido-4-oxo-5-hexenoic acid. The corresponding methyl group is, however, not coordinated by any amino acid...
Structural and functional studies will be carried out in order to provide a molecular-level understanding of the role of heme proteins in fundamental physiologi...
The structure of the heme group in an H-NOX protein is highly distorted from planarity. The structural distortion is not an intrinsic property of the isolated molecule. Several factors are found to be responsible for the strong structural distortion in H-NOX. They include (1) the two periphera...
However, the fluorescence analysis shows the degradation of the heme group in protein; the hemes are non-fluorescent, but during the heme degradation, the fluorescent porphyrin oHadtf(amafcoohOhnndbe2ruieamgdsO2xinn•etmrNt−hNi2raudgx)p2)veder2t,tefoaueassoaahddrttratdraaitremoorfanmtuAoe...
In addition, this protein is capable of covalently attaching a reactive histidine to the heme 2-vinyl group. The structure of the protein in the low-spin ferric state with intact vinyl substituents was solved by NMR methods. It was found that the structure differs from that of known truncated...