The bacteriophage T7 tail complex consists of a conical tail-tube surrounded by six kinked tail-fibres, which are oligomers of the viral protein gp17.

1: Molecular substructure of a viral receptor-recognition protein. The gp17 tail-fiber of bacteriophage T7. Steven AC, Trus BL, Maizel JV, Unser M, Parry DA, Wall JS, Hainfeld JF, Studier FW; J Mol Biol 1988;200:351-365. PMID:3259634