This protein has 2-fold rotational symmetry.

Peisach, D., Chipman, D. M., Van Ophem, P. W., Manning, J. M., Ringe, D.: Crystallographic study of steps along the reaction pathway of D-amino acid aminotransferase. Biochemistry 37 pp. 4958 (1998) (PubMed)

3daa (PDB)

trimer