Secondary structure of Ac-Ala${}_n$-LysH${}^{+}$ polyalanine peptides ($n$=5,10,15) in vacuo: Helical or not?

M. Rossi, V. Blum, P. Kupser +5

The polyalanine-based peptide series Ac-Ala_n-LysH+ (n=5-20) is a prime example that a secondary structure motif which is well-known from the solution phase (here: helices) can be…