Cambridge Isotope Laboratories (CIL) made available a series of application notes on the use of stable isotopes in Biomolecular NMR. These application notes were written by some of the world's leading researches in the field, including several Canadian scientists.
Lewis Kay (University of Toronto) "Alanine Probes of Supra-Molecular Structure and Dynamics", page 9.
Leonid S. Brown and Vladimir Ladizhansky (University of Guelph) "Pichia pastoris as a Eukaryotic Protein Isotope-Labeling System", pages 14-15.
Ying Fan, Lichi Shi, Vladimir Ladizhansky and Leonid S. Brown (University of Guelph) "Uniform Isotope Labeling of Eukaryotic Proteins in Methylotrophic Yeast for High-Resolution NMR Studies - Extension to Membrane Proteins", Application Note 26, pages 71-74.
Recent research by Gang Wu's group (Queen's University) is cited as an example of advanced 17O NMR spectroscopy in large protein-ligand complexes in solution and in the solid state, "17O NMR reagents", page 34.
These application notes are available for download as a PDF file (5.1MB) "Stable Isotopes for Structural Biomolecular NMR Catalog" at:
http://www.isotope.com/cil/literature/research_literature/index.cfm