Direct observation of better hydration at the N terminus of an alpha-helix with glycine rather than alanine as the N-cap residue.
Harpaz, Y., Elmasry, N., Fersht, A.R., Henrick, K.(1994) Proc Natl Acad Sci U S A 91: 311-315
- PubMed: 8278384 
- DOI: 10.1073/pnas.91.1.311
- Primary Citation of Related Structures:  
1YPA, 1YPB, 1YPC - PubMed Abstract: 
The structural basis for the stability of N termini of helices has been analyzed by thermodynamic and crystallographic studies of three suitably engineered mutants of the barley chymotrypsin inhibitor 2 with Ser, Gly, or Ala at the N-cap position (residue 31) ...