1h nmr spectroscopy has been used to collect data related to the spatial structure of insectotoxin i5a buthus eupeus : ph-dependence of the chemical shifts , deuterium exchange rates of individual amide hydrogens , spin-spin coupling of the h-n-c alpha-h and h-c alpha-c beta-h protons , and nuclear overhauser effect between distinct protons belonging to amino acid residues remote in the sequence .
C0011744
deuterium
C0020275
hydrogens