Fig. 1: Cryo-EM density map of HcKCR1 embedded in peptidisc.

a Trimer of HcKCR1 with C3 symmetry containing lipid molecules (grey) in the center (view from cytoplasm). The trimer is surrounded by few sterol and phospholipids and 37-residue peptidisc peptides. b Ring of helical peptidisc peptides encircling the HcKCR1 trimer (cytoplasmic side up).