Correlation of TrpGly and GlyTrp Rotamer Structure with W7 and W10 UV Resonance Raman Modes and Fluorescence Emission Shifts
TrpGly zwitterion calculated vibrations at 1271 cm−1. Prominent motions for all dipeptide species include a C8-N1-C2 symmetric stretch synchronous with a C3-C9 stretch. A Cmethylene-Cα-Ccarbonyl symmetric stretch is found only for the TrpGly zwitterion. Hydrogen bending motions are found on C2, C4–7, and Cmethylene.