Fig. 2: Structures of six CACs.
From: Structural basis for the distinct core-antenna assembly of cryptophyte photosystem II
a Superposition of the apoproteins of six CACs. Three transmembrane helices and two lumenal helices are labeled. Different regions among six CACs are circled by dashed line. b Superposition of chlorophyll molecules in six CAC subunits. Conserved and nonconserved chlorophylls among six CACs are labeled in black and red, respectively. c Superposition of Chl c molecules in six CACs. The binding sites of these Chl c molecules are labeled. d Superposition of carotenoid molecules in six CACs. The type of carotenoids and their binding sites are labeled. The number in parentheses represents the number of the CAC protein (i.e., 1 indicates CAC1) in (b–d). The color codes for the six CAC subunits are the same as in Fig. 1c. The structure of CAC1 apoprotein is shown in transparent cartoon mode in (b–d).
