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(a) Experimental 4.0 Å SAD electron density map contoured at 1.5σ showing (b) one of the large pores situated in each facet of the PhTET1-12s particle that gives access to the interior of the system and (c) one of the small orifices situated on each of the four apices. Figs. 1 ▶ and 2 ▶ were prepared using COOT (Emsley et al., 2010 ▶) and PyMOL (http://www.pymol.org/).
