Figure 1

Structure of the bacteriophage T4 head. A) Cryo-EM reconstruction of phage T4 capsid [5]; the square block shows enlarged view showing gp23 (yellow subunits), gp24 (purple subunits), Hoc (red subunits) and Soc (white subunits); B) Structure of RB49 Soc; C) Structural model showing one gp23 hexamer (blue) surrounded by six Soc trimers (red). Neighboring gp23 hexamers are shown in green, black and magenta [28]; D) Structure of gp24 [6]; E) Structural model of gp24 pentameric vertex.