ABSORPTION SPECTRA, MAGNETIC MOMENTS AND BINDING OF IRON IN SOME HAEMOPROTEINS
ABSORPTION SPECTRA, MAGNETIC MOMENTS AND BINDING OF IRON IN SOME HAEMOPROTEINS
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DOI：
10.1042/bj0780246
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发表时间：
1961-01-01
影响因子：
4.1
通讯作者：
WILLIAMS, RJP
中科院分区：
文献类型：
--
作者：
BRILL, AS;WILLIAMS, RJP
提出了一种铁卟啉配合物吸收带的分类方法。有两组吸收带，一组两个是由于电荷转移到高自旋的Fe3+离子，另一组三个是由于卟啉的吸收带。只有第二组能带出现在低自旋复合体中。对吸收光谱的分析可以用来估计存在于平衡混合物的络合物中的低自旋和高自旋铁的数量。本文描述了五配位和六配位已知基团的性质与铁卟啉配合物的吸收光谱之间的关系。这些关系导致了一套诊断规则，通过这些规则可以识别与铁卟啉结合的基团的类型。铁和亚铁的卟啉衍生物的规则不同，分别进行了讨论。磁性、氧化还原和某些化学性质为配位基团的诊断提供了额外的证据。作为诊断方法的说明，讨论了血液蛋白过氧化氢酶、过氧化物酶、血红蛋白和肌红蛋白中铁结合基团的性质，以及过氧化氢酶和过氧化物酶的过氧化氢酶化合物II和III中的配位。
A classification of the absorption bands of ferric porphyrin complexes is suggested. There are two groups of absorption bands, one group of two due to charge transfer to high-spin Fe3+ ions, and another group of three due to the absorption bands of the porphyrin. Only the second group of bands appears in low-spin complexes. An analysis of the absorption spectrum can be used to estimate the amounts of low-spin and high-spin ferric iron present in complexes which are equilibrium mixtures. The relationships between the properties of known groups in the fifth and sixth co-ordination positions and the absorption spectra of iron porphyrin complexes are described. These relationships lead to a set of diagnostic rules by which the type of group bound to the iron porphyrin can be recognized. The rules for ferric and ferrous porphyrin derivatives differ and are separately discussed. Magnetic, oxidation-reduction and some chemical properties provide additional evidence upon which the diagnosis of co-ordinating groups can be based. As an illustration of the diagnostic method, the nature of the groups binding the iron in the haemoproteins catalase, peroxidase, haemoglobin and myoglobin is discussed., as is the co-ordination in the peroxide compounds II and III of catalase and peroxidase.