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Investigation on Intermolecular Forces Between Bile Pigments and Polar Model Compounds Mimicking the Chromophore - Protein Interactions in Biliproteins by Daniel Krois is a Chemistry article available to read on EtoBox.
What is Investigation on Intermolecular Forces Between Bile Pigments and Polar Model Compounds Mimicking the Chromophore - Protein Interactions in Biliproteins about?
A systematic investigation of intermolecular mteractions of biliverdm-IXa-dimethyl ester and 2,18-bridged helically fixed verdinord and rubinoid analogues with a variety of churl compounds possessing a limited numb of donor and/or acceptor sites was performed. To evaluate intemchon strengths the concentration dependent of the induced chii diicrimma~on between M and P helical species as detected by CD was used. Bilk&in esters show pronounced association only with compounds exhibiting strong hydrogen bonding donor properties. In particular, if the donor of the ligand is provided by a carboxylic acid group detined 1 : 1 complexes are formed but no pmtonation of the tetrapyrrole backbone rakes place. 2,18-bridged helical bilirubins -being monomeric under the conditions employedbehave similarly but interact with accep(ors, too. Association constants were determined by Scatchard plot analysis, The quantitative data gained allow to map the non-covalent polar binding propeties of helical bilkerdins and biliibins. The implications of results for the conformation determming interactions in biliverdin peptides and biliproteins are discussed
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- Author
- Daniel Krois
- Publisher
- Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0040-4020)
- Published
- 1993
- Language
- EN
- Field
- Chemistry (Physical Sciences)