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On the Conformation of Bilirubin Dimethyl Ester from Circular Dichroism Spectroscopy

 

作者: Yu-Ming Pu,   DavidA. Lightner,  

 

期刊: Spectroscopy Letters  （Taylor Available online 1991）
卷期: Volume 24, issue 7-8  

页码: 983-993

 

ISSN:0038-7010

 

年代: 1991

 

DOI:10.1080/00387019108020677

 

出版商: Taylor & Francis Group

 

关键词: Bilirubin;α,α'-Dimethylmesobilirubin-XIIIα Dimethyl Ester;Stereochemistry;Circular Dichroism

 

数据来源: Taylor

 

摘要:

Unlike the parent diacid, the dimethyl ester of (αR,α'R)-dimethylmeso-bilirubin-XIIIα exhibits only a weak bisignate circular dichroism (CD) spectrum in a wide variety of solvents. This implies a loss of conformation stabilization afforded (in the diacid) by intramolecular hydrogen bonding, and with it the loss of an allosteric effect that forces the parent acid into theP-helicity conformational enantiomer.

 

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