Effects of proline ring conformation on theoretical π-π* absorption and CD spectra of helical poly(L-proline) forms I and II

✍ Scribed by Kathryn A. Thomasson; Jon Applequist

• Publisher: Wiley (John Wiley & Sons)
• Year: 1991
• Tongue: English
• Weight: 548 KB
• Volume: 31
• Category: Article
• ISSN: 0006-3525
• DOI: 10.1002/bip.360310508

✦ Synopsis

SYNOPSIS

Absorption and CD spectra of the P-P* transition near 200 nm are calculated for helical (Pro),,, forms I and I1 with a variable proline ring conformation characterized by torsion angle X in the range -60' to 60". The spectra for poly ( P r o ) I are not sufficiently sensitive to X * to suggest a preferred ring conformation. The spectra for poly(Pro) I1 are more sensitive to x 2 , and suggest preferred ring conformations near either or both of the x 2 regions -50 k 10" and 50 k 10".