Science - USA (2020-08-21)

Croceet al.,Science 369 , eaay2058 (2020) 21 August 2020 4of9

10 ns

EET Chl b to Chl a in complex

equilibration

within

complexes

excited

state

EET Car to Chl decay

EET

between

complexes^

via Chl b

fs 1 ps 10 ps 100 ps 1 ns

CS in the RCs

EET between complexes via Chl a

100

Fig. 3. Timeline of different processes related to light harvesting.

Fig. 4. Structures of PSI from various organisms.[For original data, please see ( 27 ), ( 38 ), ( 62 ), ( 64 ), and ( 108 )]. For most complexes, the number of Chls and the
average time of trapping of excitations in the reaction center are provided ( 11 , 57 , 65 , 109 ). In each structure, the new elements compared with the structure
before are highlighted in brighter colors and/or their names are given. The subunits that are common to several complexes are shown in the same color; e.g., the
individual subunits of the PSI core are shown in different blue colors in the PSI core of cyanobacteria, whereas in the other structures, the core is shown in light blue.
Chlais shown in green, Chlbin blue, and carotenoids in orange. *The number of Chls is estimated based on the number of LHCs ( 68 ).

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