I3C-NMR studies of modified 6-lactoglobulins, cyanylated at the single thiol group, have provided evidence to support the location of the thiol at Cys-121 [ I J and useful information about the nuclear relaxation behaviour of the thiocyanate carbons of cyanylated thiol groups in proteins [2]. The O-lactoglobulin monomer contains two tryptophan residues. Trp-19 is buried deep inside the hydropho...
