Cross-linking of amino acids by formaldehyde. 13C N.M.R. spectra of model compounds
- 1 January 1975
- journal article
- research article
- Published by CSIRO Publishing in Australian Journal of Chemistry
- Vol. 28 (4) , 917-924
- https://doi.org/10.1071/ch9750917
Abstract
The use of 13C N.M.R. for the identification of the site of cross- linking of amino acids by formaldehyde has been evaluated by use of model compounds, such as 2,4-dimethylphenol for tyrosine. The 13C chemical shifts of the formaldehyde-derived methylene carbons occur within the range 50-60 p.p.m. downfield from Me4Si. Estimated shifts in lysine-lysine and tyrosine-glutamine cross-linked systems fall just outside this region. The 13C spectra of a number of related phenols, amines and protected amino acids are also reported.Keywords
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