Fig. 3: Trimeric organization of CAC.
From: Growth phase-dependent reorganization of cryptophyte photosystem I antennae
a, b Superposition of CAC apo-proteins (a) and chlorophyll (b) of four CAC trimers. The black arrow in (a) indicates the stromal end of helix C in the first CACs. c Specific interaction between neighboring CACs in the trimer, shown in zoom-in views of the regions encircled by boxes in (a). d Different conformation of helix C and AC loop regions adopted by CACs in four trimers. The longer AC loop in the first CACs and the corresponding region in the second and third CACs are colored in black. The N-terminal fragment of the first and second CACs involved in the interaction with helix C of neighboring CACs are in green color.
