(A) view from within the plane of the membrane; (B) view from the cytoplasm. Proteins are displayed as Cα cartoon, ANK repeat region of ankyrin in green, RhAG in light blue, RhCE in mid-blue RhD in dark blue, CD47 in organe and protein 4.2 in pink. For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.