Selected views of the 70S ribosome of E. coli as obtained by cryo-electron microscopy of single ribosomes and reconstruction using 4300 projections (Frank et al., Nature 376 (1995) 441-444).

Yellow: 30S subunit, blue: 50S subunit.

(from Frank et al., Biochem. Cell Biol. 73 (1995) 757-767.)