Fig. 4: Structures of IsiA-2, IsiA-3, and IsiA-6.

Structures of IsiA-2, IsiA-3, and IsiA-6 depicted in transparent cartoon model and arrangements of Chl and β-carotene (BCR). Chls and β-carotene are colored green and orange, respectively. Only rings of the Chl molecules are depicted.