Fig. 3.
Room temperature TA of ζ-carotene–containing LH2 from R. sphaeroides upon excitation of the Car absorption band. (A) The 2D pseudocolor contour of TA with spectral features marked. (B) Representative TA spectra taken at various delay times after excitation at the (0-0) vibronic band of the S0 → S2 absorption of ζ-carotene. (C) Example TA time courses recorded at selected wavelengths. (D) EADS with application of a sequential decay model. (Inset) A zoomed-in view of the Qx band. GSB, ground state bleaching.