Details of the T4 baseplate structure; reprinted from . Proteins are labeled with their respective gene numbers. A, The garland of short tail fibers gp12 (magenta) with gp11 structures (light blue Cα trace) at the kinks of the gp12 fibers. The six-fold axis of the baseplate is shown as a black line. B, The baseplate "pins", composed of gp7 (red), gp8 (dark blue Cα trace), gp10 (yellow), and gp11(light blue Cα trace). Shown also is gp9 (green Cα trace), the long tail fiber attachment protein, with a green line along its three-fold axis, representing the direction of the long tail fibers. C, Gp6, gp25, and gp53 density.