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Triple resonance 3D NMR methods have been used to study the interaction between calcineurin B and a peptide fragment of calcineurin A for which it has high affinity (K D 4 10 -7 M). Although calcineurin B aggregates at NMR concentrations of 1 mM, in the presence of a target peptide fragment of calcineurin A it becomes monomeric and yields NMR spectra that are very similar...
The interactions of the peptide RP135a (RKSI-RIQRGPGRAFVT), corresponding to residues 311-326 of gp120 of HIV-1 IIIB , with the anti-gp120 HIV-1 IIIB neutralizing antibody 0.5β were studied by NMR. The NOESY difference spectra measured using specifically deuterated derivatives of the peptide show exclusively the interactions of the deuterated residues...
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