Extended Data Fig. 4: Stereo views of interdomain junctions within the Arabidopsis PhyA dimer.

The intricate interconnectivities of domains within the PSM are shown in the top three views. The fourth and fifth views highlight the modulator loop (Mod)/PHY domain connection, which provides an intra-protomer structural link with the PSM, and their connectivity to the hairpin, helical spine, and PAS2 domain features. The sixth view shows one half of the dimeric interface of the HKRD involving the DHp and CA domain α-helices. Key residues are indicated; prime designations indicate those from protomer B.