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Figure 2.
Figure 2: Cofactors of the electron transfer chain (ETC) and of
PsaC. View parallel to the membrane plane. The pairs of
chlorophylls of the ETC are arranged in two branches A and B.
They are labelled eC, followed by the letter A or B indicating
whether PsaA or PsaB, respectively, coordinates Mg2+, and by
numbers 1 to 3 starting from the lumenal side. Phylloquinones
are Q[K]-A and Q[K]-B. The Fe[4]S[4] clusters are labelled F[X],
F[A] and F[B] according to their spectroscopic terms. The
centre-to-centre distances between the cofactors (black lines)
are given in Å. In PsaC, parts analogous to 2[Fe[4]S[4]]
bacterial ferredoxins are pink, an insertion and extensions at
C and N termini are green.
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