Fig. 3.

Structures of the minor capsid proteins that glue together capsomers within each trisymmetron. Each minor capsid protein is rainbow colored from red at the C terminus to magenta at the N terminus. The neighboring capsomers are shown in gray and labeled as in Fig. 1c. a The minor capsid protein P2 (blue in Fig. 1c). Scale bar, 50 Å. b The three P3 molecules within one icosahedral asymmetric unit (red in Fig. 1c) and their neighboring capsomers. Scale bar, 50 Å. c Ribbon diagram of the three-helix bundle formed by the N-terminal parts of each P3 molecule around each icosahedral 3-fold axis. The icosahedral 3-fold axis is identified by a solid black triangle. Scale bar, 10 Å. d The minor capsid protein P5. Scale bar, 50 Å. e One of the four P4 molecules within an icosahedral asymmetric unit. Scale bar, 50 Å