Issue 13, 2007

Subpicosecond UV spectroscopy of carbonmonoxy-myoglobin: absorption and circular dichroism studies

Abstract

A thorough absorption and circular dichroism study is performed in carbonmonoxy-myoglobin with a sub-picosecond visible pump, ultraviolet probe experiment. Differential absorption in the 220–360 nm range shows that the time-resolved response mainly comes from the heme and that aromatic amino acids do not contribute significantly. Time-resolved CD at 260 nm shows no dynamics and confirms this result. On the contrary, a strong CD dynamics is observed at 230 nm. This signal could originate from transient deformation of the α-helices in the protein.

Graphical abstract: Subpicosecond UV spectroscopy of carbonmonoxy-myoglobin: absorption and circular dichroism studies

Article information

Article type
Paper
Submitted
07 Nov 2006
Accepted
10 Jan 2007
First published
06 Feb 2007

Phys. Chem. Chem. Phys., 2007,9, 1611-1615

Subpicosecond UV spectroscopy of carbonmonoxy-myoglobin: absorption and circular dichroism studies

T. Dartigalongue, C. Niezborala and F. Hache, Phys. Chem. Chem. Phys., 2007, 9, 1611 DOI: 10.1039/B616173A

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