Data from two dimensional electronic spectroscopy showing that photosynthesis tunes quantum-mechanical mixing of electronic and vibrational states to steer exciton energy transfer

Raw data from an ultrafast two dimensional electronic spectrometer
investigating a series of mutants from the Fenna-Matthews Olson
photosynthetic complex from Chlorobaculum tepidum is included
here.  This data was analyzed and reduced using the enclosed
matlab scripts to show that this complex responds to changing oxidation
conditions by breaking a resonance between a gap between electronic states
and an attendant vibration within the bacteriochlorophyll molecules.
Breaking this resonance steers energy differently through the complex and
enables a photoprotective response that increases quenching of the
absorbed excitation.  In this regard, using simply the oxidation
of two cysteine residues, the complex then manipulates this quantum
mechanical vibronic coupling to redirect energy transfer and protect the
organism from photooxidative damage. This dataset includes raw and reduced
data including scripts for fitting trends, time constants, and modelling
the data using a Redfield model.  This work is being published
in Higgins et al., "Photosynthesis tunes quantum-mechanical
mixing of electronic and vibrational states to steer exciton energy
transfer", PNAS, March 8, 2021.