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- MI_0042 IAO_0000115 "EPR (also called ESR, Electron Spin Resonance) spectroscopy is analogous to NMR, but is based on the excitation of unpaired electrons instead of nuclei. Unpaired (single) electrons are only found in radicals and some metal ions (paramagnetic species); the EPR spectrum provides information about the environment and mobility of the paramagnetic species. The magnetic interaction of two paramagnetic centres in a protein can be used to calculate the distance between them; this allows studies of the movements and interactions of protein segments. In proteins without any intrinsic unpaired electrons it is possible to attach a radical probe (spin label). Stable nitroxide radicals can be bound to amino acid residues, in analogy with fluorescent probes. In combination with site directed mutagenesis this method is used in particular to study structure and assembly of membrane proteins, by measuring with EPR whether an amino acid is in a polar or non polar environment." @default.
- MI_0042 normalizedInformationContent "100" @default.
- MI_0042 referenceCount "1" @default.
- MI_0042 hasExactSynonym "EPR" @default.
- MI_0042 hasExactSynonym "ESR" @default.
- MI_0042 hasExactSynonym "epr" @default.
- MI_0042 hasOBONamespace "PSI-MI" @default.
- MI_0042 id "MI:0042" @default.
- MI_0042 inSubset PSI-MI_slim @default.
- MI_0042 type Class @default.
- MI_0042 isDefinedBy mi.owl @default.
- MI_0042 label "electron paramagnetic resonance" @default.
- MI_0042 subClassOf MI_0000 @default.
- MI_0042 subClassOf MI_0001 @default.
- MI_0042 subClassOf MI_0003 @default.
- MI_0042 subClassOf MI_0013 @default.
- MI_0042 subClassOf MI_0042 @default.
- MI_0042 subClassOf MI_0043 @default.
- MI_0042 subClassOf MI_0045 @default.
- MI_0042 subClassOf MI_0659 @default.