| Enzyme | Restriction site | Origin | Temperature |
| TaaI | ...ACN GT... ...TG NCA... | Thermus aquaticus | 65 oC |
| TaiI | ...NACGT N... ...N TGCAN... | Thermus aquaticus | 65 oC |
| TaqI | ...T CGA... ...AGC T... | Thermus aquaticus | 65 oC |
| TasI | ...N AATTN... ...NTTAA N... | Thermus aquaticus | 65 oC |
| TatI | ...W GTACW... ...WCATG W... | Thermus aquaticus | 65 oC |
| TauI | ...GCSG C... ...C GSCG... | Thermus aquaticus | 55 oC |
| TfiI | ...G AWTC... ...CTWA G... | Thermus filiformis | 65 oC |
| TliI | ...C TCGAG... ...GAGCT C... | Thermococcus litoralis | 75 oC |
| Tru1I | ...T TAA... ...AAT T... | Meiothermus ruber | 65 oC |
| Tru9I | ...T TAA... ...AAT T... | Meiothermus ruber | 65 oC |
| TseI | ...G CWGC... ...CGWC G... | Thermus species | 65 oC |
| Tsp45I | ...N GTSACN... ...NCASTG N... | Thermus species | 65 oC |
| Tsp509I | ...N AATTN... ...NTTAA N... | Thermus species | 65 oC |
| TspDTI | ...ATGAANNNNNNNNNNN N... ...TACTTNNNNNNNNN NNN... | Thermus species | 70 oC |
| TspGWI | ...ACGGANNNNNNNNNNN N... ...TGCCTNNNNNNNNN NNN... | Thermus species | 70 oC |
| TspRI | ...NNNCASTGNN N... ...N NNGASACNNN... | Thermus species | 65 oC |
| Tth111I | ...GACN NNGTC... ...CTGNN NCAG... | Thermus thermophilus | 65 oC |
| Van91I | ...CCANNNN NTGG... ...GGTN NNNNACC... | Listonella anguillarum | 37 oC |
| Vha464I | ...C TTAAG... ...GAATT C... | Vibrio harveyi | 37 oC |
| VneI | ...G TGCAC... ...CACGT G... | Vibrio nereis | 37 oC |
| VpaK11BI | ...G GWCC... ...CCWG G... | Vibrio parahaemolyticus | 30 oC |
| VspI | ...AT TAAT... ...TAAT TA... | Vibrio species | 37 oC |
| XagI | ...CCTNN NNNAGG... ...GGANNN NNTCC... | Xanthobacter agilis | 37 oC |
| XapI | ...R AATTY... ...YTTAA R... | Xylophilus ampelinus | 37 oC |
| XbaI | ...T CTAGA... ...AGATC T... | Xanthomonas campestris | 37 oC |
| XceI | ...RCATG Y... ...Y GTACR... | Xanthomonas campestris | 37 oC |
| XcmI | ...CCANNNNN NNNNTGG... ...GGTNNNN NNNNNACC... | Xanthomonas campestris | 37 oC |
| XhoI | ...C TCGAG... ...GAGCT C... | Xanthomonas campestris | 37 oC |
| XhoII | ...R GATCY... ...YCTAG R... | Xanthomonas campestris | 37 oC |
| XmaI | ...C CCGGG... ...GGGCC C... | Xanthomonas campestris | 37 oC |
| XmaCI | ...C CCGGG... ...GGGCC C... | Xanthomonas campestris | 37 oC |
| XmaJI | ...C CTAGG... ...GGATC C... | Stenotrophomonas maltophilia | 37 oC |
| XmiI | ...GT MKAC... ...CAKM TG... | Stenotrophomonas maltophilia | 37 oC |
| XmnI | ...GAANN NNTTC... ...CTTNN NNAAG... | Xanthomonas axonopodis | 37 oC |
| XspI | ...C TAG... ...GAT C... | Xanthomonas species | 37 oC |
| ZraI | ...GAC GTC... ...CTG CAG... | Zoogloea ramigera | 37 oC |
| ZrmI | ...AGT ACT... ...TCA TGA... | Zoogloea ramigera | 37 oC |
| Zsp2I | ...ATGCA T... ...T ACGTA... | Zoogloea species | 37 oC |