Fig. 6.

The experimentally determined interactome for human bZIP proteins taken from Newman and Keating⁴¹. The darker the squares are the more statistically significant the interaction. Dark squares on the diagonal indicate strong homodimeric interactions, and off-diagonal dark squares heterodimeric interactions (surface-bound proteins are shown on the left and fluorescently labeled probes are shown across the top).

Reproduced with permission from Newman and Keating⁴¹, copyright The American Association for the Advancement of Science (2003).