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Elsevier, Biophysical Journal, 12(97), p. 3215-3223, 2009

DOI: 10.1016/j.bpj.2009.09.037

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A Femtosecond Visible/Visible and Visible/Mid-Infrared Transient Absorption Study of the Light Harvesting Complex II

Journal article published in 2009 by Andreas D. Stahl, Mariangela Di Donato, Ivo van Stokkum, Rienk van Grondelle, Marie Louise Groot ORCID
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

Light harvesting complex II (LHCII) is the most abundant protein in the thylakoid membrane of higher plants and green algae. LHCII acts to collect solar radiation, transferring this energy mainly toward photosystem II, with a smaller amount going to photosystem I; it is then converted into a chemical, storable form. We performed time-resolved femtosecond visible pump/mid-infrared probe and visible pump/visible probe absorption difference spectroscopy on purified LHCII to gain insight into the energy transfer in this complex occurring in the femto-picosecond time regime. We find that information derived from mid-infrared spectra, together with structural and modeling information, provides a unique visualization of the flow of energy via the bottleneck pigment chlorophyll a604.