Fig. 1.
From: Blob-ology and biology of cryo-EM: an interview with Helen Saibil
Structure of bacteriorhodopsin. a Part of the 3D potential map of bacteriorhodopsin as described by Henderson and Unwin [1]. b, c ‘Top down’ (b) and transmembrane (c) structure of bacteriorhodopsin taken from PDB (PDB ID 1FBB). ‘Blobs’ in a are helices viewed from above, as in b. Image in a reprinted by permission from Macmillan Publishers Ltd: Nature [1], copyright 1975