✦ LIBER ✦

Dynamic properties of oxy- and carbonmonoxyhemoglobin probed by optical spectroscopy in the temperature range of 300–20 K

✍ Scribed by Maurizio Leone; Antonio Cupane; Eugenio Vitrano; Lorenzo Cordone

Publisher: Wiley (John Wiley & Sons)
Year: 1987
Tongue: English
Weight: 565 KB
Volume: 26
Category: Article
ISSN: 0006-3525
DOI: 10.1002/bip.360261009

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✦ Synopsis

Synopsis

We have studied the absorption bands of oxy-and carbonmonoxyhemoglobin in the wavelength range of 650-350 nm (visible and Soret bands) and in the temperature range of 300-20 K. The spectra in the whole temperature range have been successfully deconvoluted in terms of gaussian components. The analysis of the temperature dependence of the first and second moment of the bands enables us to compare dynamic properties of the heme group in oxy-and carbonmonoxyhemoglobin. The results of the analysis indicate that the "mean-effective" frequency of the nuclear motion coupled to the electronic transition responsible for the visible bands is higher in carbonmonoxy-than in oxyhemoglobin. The possible functional relevance of this finding is discussed.

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