This family consists of type II restriction enzymes (EC:3.1.21.4) that recognise the double-stranded sequence CTCGAG and cleave after C-1.

1: Nucleotide sequence of the PaeR7 restriction/modification system and partial characterization of its protein products. Theriault G, Roy PH, Howard KA, Benner JS, Brooks JE, Waters AF, Gingeras TR; Nucleic Acids Res 1985;13:8441-8461. PMID:3001639

2: 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