Histidine 121 of Staphylococcal Nuclease. Correlation of the Hdelta2 1H NMR Assignment and Reinterpretation of the Role This Residue Plays in Conformational Heterogeneity of the Protein - Hinck, Andrew P.; Loh, Stewart N.; Wang, Jinfeng; Markley, John L. (Biological Magnetic Resonance Bank, 1999)