Dodecamer: Tetramer of trimers

This protein has four 3-fold and many 2-fold axes of rotational symmetry.

Gourley, D. G., Shrive, A. K., Polikarpov, I., Krell, T., Coggins, J. R., Hawkins, A. R., Isaacs, N. W., Sawyer, L.: The two types of 3-dehydroquinase have distinct structures but catalyze the same overall reaction. Nat Struct Biol 6 pp. 521 (1999) (PubMed)

2dhq (PDB)