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Breathing vibration of poly-L-alanine α-helix

✍ Scribed by Koichi Itoh; Takehiko Shimanouchi

Publisher
Wiley (John Wiley & Sons)
Year
1971
Tongue
English
Weight
105 KB
Volume
10
Category
Article
ISSN
0006-3525

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✦ Synopsis

Breathing V i b r a t i o n of Poly-1-alanine a-Helix

I n a previous paper' the normal frequencies and modes were calculated for the poly-1,-alanine a-helix, arid the far-infrared ahsorpt,iori barids arid their dichroism were interpreted. Almost all the calculated vibrations have their corresponding absorption bands. However, we could not find the hand for the A species ~1 7 , the calrtilated frequency being 259 cm-1. The vibrational mode shown in Figiire 4 of reference 1 tells that this is the breat.hirig vibration of the 0-helix backbone.

Recently the I<amaii spectra were measured for poly-1,-alanine by Koenig and Sutt,on2 and by Faricorii et al.3 The correspondence between the calculated frequencies

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