15N NMR studies of amino acids and their reaction products with formaldehyde |
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Authors: | N Naulet D Tom G J Martin |
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Institution: | N. Naulet,D. Tomé,G. J. Martin |
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Abstract: | Natural abundance 15N NMR spectroscopy has been used to investigate the effect of pH on the 15N chemical shifts of lysine and of ε-hydroxymethyllysine. A computer calcualtion which fits the chemical shifts of both α-and ε-nitrogen atoms versus pH has been used to predict the pKa values. 15N chemical shifts and some 1J(15NH) values of some other amino acids and of their reaction products with formaldehyde are also reported. |
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