LIGHT-INDUCED CONFORMATIONAL CHANGES OF POLYPEPTIDES.

A. Ueno, J. Anzai, K. Takahashi, T. Osa

Research output: Contribution to journalConference articlepeer-review

Abstract

The azoaromatic residues attached to macromolecules can be used to control polymer conformation by light. In previous studies, the authors have already shown the occurrence of light-induced conformational changes of polypeptides on some copolymers of beta -p-(phenylazo) benzyl-L-aspartate with beta -benzyl-L-aspartate or gamma -benzyl-L-glutamate. This paper presents results of the investigation performed on a new copolymer series (eA series) of beta -p-(phenylazo)phenethyl-L-aspartate (e) and B-benzyl-L-aspartate (A). Copolymers of eA series were prepared by using varying ratios of beta -benzyl-L-aspartate NCA and beta -p-(phenylazo)phenethyl-L-aspartate NCA. Photoirradiation was carried out using a Corning 7-37 filter. CD spectra were recorded on a JASCO J-20 circular dichrograph apparatus. Molar ellipticities were calculated for the supposedly intrinsic band around 222 nm using the molar concentration of amide groups, while the molar concentration of the azo groups was used for the calculation of the ellipticities associated with the extrinsic bands. Experimental data are presented graphically.

Original languageEnglish
Pages (from-to)437-438
Number of pages2
JournalAm Chem Soc Div Polym Chem Prepr
Volume20
Issue number1
Publication statusPublished - 1979 Jan 1
EventPap presented at Jt ACS/JCS (Am Chem Soc/Jpn Chem Soc) Meet - Honolulu, HI, USA
Duration: 1979 Apr 11979 Apr 6

ASJC Scopus subject areas

  • Polymers and Plastics

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