This family includes the AlwI (recognises GGATC), Bsp6I (recognises GC^NGC) , BstNBI (recognises GASTC), PleI(recognises GAGTC) and MlyI (recognises GAGTC) restriction endonucleases.

1: Sequence, structure and functional diversity of PD-(D/E)XK phosphodiesterase superfamily. Steczkiewicz K, Muszewska A, Knizewski L, Rychlewski L, Ginalski K; Nucleic Acids Res. 2012;40:7016-7045. PMID:22638584