Protein
A simple tutorial
Another tutorial
http://www.nmr2.buffalo.edu/nesg.wiki/Resonance_Assignment/CARA/Backbone_assignment
http://www.cryst.bbk.ac.uk/PPS2/projects/schirra/html/assign.htm
RNA
Brief tutorial in Al-Hashimi lab
Another tutorial in A-Hashimi lab
Julie Feigon's lecture
Legault's presentation