Wavelength dependent configurational photoisomerisation of bilirubins interpreted by spectral absorptions

Marina Mazzoni; Giovanni Agati; Gordon Troup; Riccardo Pratesi

doi:10.1117/12.530949

19 November 2003 Wavelength dependent configurational photoisomerisation of bilirubins interpreted by spectral absorptions

Marina Mazzoni, Giovanni Agati, Gordon Troup, Riccardo Pratesi

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Proceedings Volume 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life; (2003) https://doi.org/10.1117/12.530949
Event: 19th Congress of the International Commission for Optics: Optics for the Quality of Life, 2002, Florence, Italy

Abstract

We measured the 4Z,15Z→4Z,15E configurational photoisomerization quantum yields of bilirubin-IXα (BR-IX), the intrinsically asymmetric bile pigment associated with jaundice, when it is irradiated in ammoniacal methanol solution, and of BR-IX and symmetrically-substituted bilirubins (bilirubin-IIIα and mesobilirubin-XIIIα) bound to human serum albumin (HSA) in aqueous solution. The quantum yield wavelength dependence was attributed to fast changes induced in the molecule conformation before photoisomerization.

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Marina Mazzoni, Giovanni Agati, Gordon Troup, and Riccardo Pratesi "Wavelength dependent configurational photoisomerisation of bilirubins interpreted by spectral absorptions", Proc. SPIE 4829, 19th Congress of the International Commission for Optics: Optics for the Quality of Life, (19 November 2003); https://doi.org/10.1117/12.530949

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