This family of restriction endonucleases belongs to the PD-(D/E)XK superfamily. It cuts the recognition site CG^CG leaving blunt ends [1].

1: DNA intercalation without flipping in the specific ThaI-DNA complex. Firczuk M, Wojciechowski M, Czapinska H, Bochtler M; Nucleic Acids Res. 2011;39:744-754. PMID:20861000

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