{"title":"牛血红蛋白溶液中的核磁弛豫谱。","authors":"R Kimmich","doi":"10.1515/znb-1971-1117","DOIUrl":null,"url":null,"abstract":"The longitudinal proton relaxation time T1 of aqueous solutions of bovine ferrihemoglobin and carboxilated hemoglobin was measured in the Larmor frequency range 3·103 Hz to 1,2·108 Hz. The dispersion curves are explained by diamagnetic and electron paramagnetic relaxation mechanisms. An efficient direct dipolar coupling between the paramagnetic heme-groups and the water protons in ferrihemoglobin solutions can be excluded. The flat dispersion behaviour of the diamagnetic contribution suggests a broad distribution of molecular motions i. e. a certain flexibility of the hemoglobin molecule.","PeriodicalId":23706,"journal":{"name":"Zeitschrift fur Naturforschung. Teil B, Chemie, Biochemie, Biophysik, Biologie und verwandte Gebiete","volume":"266 11","pages":"1168-70"},"PeriodicalIF":0.0000,"publicationDate":"1971-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/znb-1971-1117","citationCount":"11","resultStr":"{\"title\":\"Nuclear magnetic relaxation spectroscopy in solutions of bovine hemoglobin.\",\"authors\":\"R Kimmich\",\"doi\":\"10.1515/znb-1971-1117\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The longitudinal proton relaxation time T1 of aqueous solutions of bovine ferrihemoglobin and carboxilated hemoglobin was measured in the Larmor frequency range 3·103 Hz to 1,2·108 Hz. The dispersion curves are explained by diamagnetic and electron paramagnetic relaxation mechanisms. An efficient direct dipolar coupling between the paramagnetic heme-groups and the water protons in ferrihemoglobin solutions can be excluded. The flat dispersion behaviour of the diamagnetic contribution suggests a broad distribution of molecular motions i. e. a certain flexibility of the hemoglobin molecule.\",\"PeriodicalId\":23706,\"journal\":{\"name\":\"Zeitschrift fur Naturforschung. Teil B, Chemie, Biochemie, Biophysik, Biologie und verwandte Gebiete\",\"volume\":\"266 11\",\"pages\":\"1168-70\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1971-11-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1515/znb-1971-1117\",\"citationCount\":\"11\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Zeitschrift fur Naturforschung. Teil B, Chemie, Biochemie, Biophysik, Biologie und verwandte Gebiete\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1515/znb-1971-1117\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Zeitschrift fur Naturforschung. Teil B, Chemie, Biochemie, Biophysik, Biologie und verwandte Gebiete","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1515/znb-1971-1117","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Nuclear magnetic relaxation spectroscopy in solutions of bovine hemoglobin.
The longitudinal proton relaxation time T1 of aqueous solutions of bovine ferrihemoglobin and carboxilated hemoglobin was measured in the Larmor frequency range 3·103 Hz to 1,2·108 Hz. The dispersion curves are explained by diamagnetic and electron paramagnetic relaxation mechanisms. An efficient direct dipolar coupling between the paramagnetic heme-groups and the water protons in ferrihemoglobin solutions can be excluded. The flat dispersion behaviour of the diamagnetic contribution suggests a broad distribution of molecular motions i. e. a certain flexibility of the hemoglobin molecule.
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