A solid story: The paramagnetic form of the protein superoxide dismutase (SOD; see portion of structure in upper right corner of picture with detectability sphere in blue) is shown to be accessible to high-resolution solid-state magic angle spinning NMR studies when in microcrystalline form. A nearly complete assignment of the signals of this 32-kDa dimer has been achieved (13C–15N NMR correlation spectrum shown in background).
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