| Enzyme | PDB code | Source |  Recognition sequence  | Cut |  Isoschizomers  | 
|  HacI  |  |  Halococcus acetoinfaciens  |  5' GATC 
  3' CTAG  |  5' ---   GATC--- 3' 
  3' ---CTAG   --- 5'  | Bme12I, Bsp67I, BstENII, CcyI, FnuEI, MgoI, NphI, Sau3AI | 
|  HaeI  |  |  Haemophilus aegyptius  |  5' WGGCCW 
  3' WCCGGW  |  5' ---WGG   CCW--- 3' 
  3' ---WCC   GGW--- 5'  |  | 
|  HaeII  |  |  Haemophilus aegypticus  |  5' RGCGCY 
  3' YCGCGR  |  5' ---RGCGC   Y--- 3' 
  3' ---Y   CGCGR--- 5'  | | AccB2I,   |  BfoI,  | Bme142I,   |  | Bsp143II, BstH2I, LpnI |  
  | 
|  HaeIII  |  |  Haemophilus aegypticus  |  5' GGCC 
  3' CCGG  |  5' ---GG   CC--- 3' 
  3' ---CC   GG--- 5'  | BsuRI | 
|  HaeIV  |  |  Haemophilus aegyptius  |  5' GAYN5RTC 
  3' CTRN5YAG  |  5' ---GAYN5RTCN8NNNNNN   --- 3' 
  3' ---CTRN5YAGN8N   NNNNN--- 5'  |  | 
|  HalI  |  |  Hafnia alvei B6  |  5' GAATTC 
  3' CTTAAG  |  5' ---G   AATTC--- 3' 
  3' ---CTTAA   G--- 5'  |  | 
|  HalII  |  |  Hafnia alvei B6  |  5' CTGCAG 
  3' GACGTC  |  5' ---CTGCA   G--- 3' 
  3' ---G   ACGTC--- 5'  | AjoI, AliAJI, Bsp63I, CfrA4I, CfuII, CstI, PstI, SflI, Srl5DI, Sst12I | 
|  HapII  |  |  Haemophilus aphrophilus  |  5' CCGG 
  3' GGCC  |  5' ---C   CGG--- 3' 
  3' ---GGC   C--- 5'  |  | 
|  HgaI  [7]  |  |  Haemophilus gallinarum  |  5' GACGC 
  3' CTGCG  |  5' ---GACGCN4N   NNNNN--- 3' 
  3' ---CTGCGN4NNNNNN   --- 5'  |  | 
|  HgiI  |  |  Herpetosiphon giganteus 3303  |  5' GRCGYC 
  3' CYGCRG  |  5' ---GR   CGYC--- 3' 
  3' ---CYGC   RG--- 5'  | AcyI, AsuIII, BbiII, BstACI, HgiGI, HgiHII, Hin1I, PamII | 
|  HgiAI  |  |  Herpetosiphon giganteus HP1023  |  5' GWGCWC 
  3' CWCGWG  |  5' ---GWGCW   C--- 3' 
  3' ---C   WCGWG--- 5'  | | Alw21I, AspHI, Bsh45I, BsiHKAI,   |  
 |  Bsm6I, HpyF46II,  | MspV281I |  
  | 
|  HgiBI  |  |  Herpetosiphon giganteus Hpg5  |  5' GGWCC 
  3' CCWGG  |  5' ---G   GWCC--- 3' 
  3' ---CCWG   G--- 5'  | Bme18I, BthAI, DsaIV, ErpI, FspMSI, HgiEI, Psp03I, VpaK11AI | 
|  HgiCI  |  |  Herpetosiphon giganteus Hpg9  |  5' GGYRCC 
  3' CCRYGG  |  5' ---G   GYRCC--- 3' 
  3' ---CCRYG   G--- 5'  | AccB1I, BanI, BspT107I, BshNI, Eco64I, HgiHI, MspB4I, PfaAI | 
|  HgiCII  |  |  Herpetosiphon giganteus Hpg9  |  5' GGWCC 
  3' CCWGG  |  5' ---G   GWCC--- 3' 
  3' ---CCWG   G--- 5'  | Bme18I, BthAI, DsaIV, FspMSI, HgiHIII, Psp03I, VpaK11AI | 
|  HgiCIII  |  |  Herpetosiphon giganteus Hpg9  |  5' GTCGAC 
  3' CAGCTG  |  5' ---G   TCGAC--- 3' 
  3' ---CAGCT   G--- 5'  |  | 
|  HgiDI  |  |  Herpetosiphon giganteus Hpa2  |  5' GRCGYC 
  3' CYGCRG  |  5' ---GR   CGYC--- 3' 
  3' ---CYGC   RG--- 5'  | AcyI, AsuIII, BbiII, BstACI, HgiGI, HgiI, Hin1I, PamII | 
|  HgiDII  |  |  Herpetosiphon giganteus Hpa2  |  5' GTCGAC 
  3' CAGCTG  |  5' ---G   TCGAC--- 3' 
  3' ---CAGCT   G--- 5'  |  | 
|  HgiEI  |  |  Herpetosiphon giganteus Hpg24  |  5' GGWCC 
  3' CCWGG  |  5' ---G   GWCC--- 3' 
  3' ---CCWG   G--- 5'  | Bme216I, BthAI, DsaIV, ErpI, FspMSI, HgiHIII, VpaK11AI | 
|  HgiGI  |  |  Herpetosiphon giganteus Hpa1  |  5' GRCGYC 
  3' CYGCRG  |  5' ---GR   CGYC--- 3' 
  3' ---CYGC   RG--- 5'  | AcyI, AosII, BbiII, BstACI, HgiI, HgiGI, Msp17I, PamII | 
|  HgiHI  |  |  Herpetosiphon giganteus HP1049  |  5' GGYRCC 
  3' CCRYGG  |  5' ---G   GYRCC--- 3' 
  3' ---CCRYG   G--- 5'  | AccB1I, BanI, BspT107I, BshNI, Eco64I, HgiCI, MspB4I, PfaAI | 
|  HgiHII  |  |  Herpetosiphon giganteus HP1049  |  5' GRCGYC 
  3' CYGCRG  |  5' ---GR   CGYC--- 3' 
  3' ---CYGC   RG--- 5'  | AosII, AsuIII, BsaHI, BstACI, HgiGI, HgiHII, Msp17I, PamII | 
|  HgiHIII  |  |  Herpetosiphon giganteus HP1049  |  5' GGWCC 
  3' CCWGG  |  5' ---G   GWCC--- 3' 
  3' ---CCWG   G--- 5'  | Bme216I, DsaIV, ErpI, HgiBI, Psp03I, VpaK11AI, VpaK11BI | 
|  HgiJI  |  |  Herpetosiphon giganteus HFS101  |  5' GGWCC 
  3' CCWGG  |  5' ---G   GWCC--- 3' 
  3' ---CCWG   G--- 5'  | Bme216I, CauI, DsaIV, FdiI, HgiBI, HgiHIII, Psp03I, VpaK11AI | 
|  HgiJII  |  |  Herpetosiphon giganteus HFS101  |  5' GRGCYC 
  3' CYCGRG  |  5' ---GRGCY   C--- 3' 
  3' ---C   YCGRG--- 5'  |  | 
|  HgiS22I  |  |  Herpetosiphon giganteus  |  5' CCSGG 
  3' GGSCC  |  5' ---CC   SGG--- 3' 
  3' ---GGS   CC--- 5'  | AhaI, AseII, AsuC2I, BcnI, CauII, Eco1831I, EcoHI, Kpn49kII | 
|  HhaI  |  |  Haemophilus haemolyticus  |  5' GCGC 
  3' CGCG  |  5' ---GCG   C--- 3' 
  3' ---C   GCG--- 5'  | AspLEI, BspLAI, BstHHI, CfoI, FnuDIII, Hin6I, HinP1I, SciNI | 
|  HhaII  |  |  Haemophilus haemolyticus  |  5' GANTC 
  3' CTNAG  |  5' ---G   ANTC--- 3' 
  3' ---CTNA   G--- 5'  |  | 
|  Hin1I  |  |  Haemophilus influenzae RFL1  |  5' GRCGYC 
  3' CYGCRG  |  5' ---GR   CGYC--- 3' 
  3' ---CYGC   RG--- 5'  | AcyI, AhaII, AosII, AstWI, AsuIII, HgiI, HgiDI, HgiDI, Hsp92I | 
|  Hin1II  |  |  Haemophilus influenzae RFL1  |  5' CATG 
  3' GTAC  |  5' ---CATG   --- 3' 
  3' ---   GTAC--- 5'  |  | 
|  Hin2I  |  |  Haemophilus influenzae RFL2  |  5' CCGG 
  3' GGCC  |  5' ---C   CGG--- 3' 
  3' ---GGC   C--- 5'  |  | 
|  Hin4I  |  |  Haemophilus influenzae RFL4  |  5' GAYN5VTC 
  3' CTRN5BAG  |  5' ---GAYN5VTCN7NNNNNN   --- 3' 
  3' ---CTRN5BAGN7N   NNNNN--- 5'  |  | 
|  Hin6I  |  |  Haemophilus influenzae RFL6  |  5' GCGC 
  3' CGCG  |  5' ---G   CGC--- 3' 
  3' ---CGC   G--- 5'  | AspLEI, BspLAI, BstHHI, CfoI, FnuDIII, HhaI, HsoI, HspAI, SciNI | 
|  HinJCI  |  |  Haemophilus influenzae JC9  |  5' GTYRAC 
  3' CARYTG  |  5' ---GTY   RAC--- 3' 
  3' ---CAR   YTG--- 5'  |  | 
|  HinP1I  |  2FL3 Search PDBe  |  Haemophilus influenzae P1  |  5' GCGC 
  3' CGCG  |  5' ---G   CGC--- 3' 
  3' ---CGC   G--- 5'  | BspLAI, BstHHI, CfoI, FnuDIII, HhaI, Hin6I, HsoI, HspAI, SciNI | 
|  HincII  |  2AUD Search PDBe  |  Haemophilus influenzae Rc  |  5' GTYRAC 
  3' CARYTG  |  5' ---GTY   RAC--- 3' 
  3' ---CAR   YTG--- 5'  |  | 
|  HindII  |  |  Haemophilus influenzae Rd  |  5' GTYRAC 
  3' CARYTG  |  5' ---GTY   RAC--- 3' 
  3' ---CAR   YTG--- 5'  |  | 
|  HindIII  |  2E52, Search PDBe  |  Haemophilus influenzae Rd  |  5' AAGCTT 
  3' TTCGAA  |  5' ---A   AGCTT--- 3' 
  3' ---TTCGA   A--- 5'  |  | 
|  HinfI  |  |  Haemophilus influenzae Rf  |  5' GANTC 
  3' CTNAG  |  5' ---G   ANTC--- 3' 
  3' ---CTNA   G--- 5'  |  | 
|  HjaI  |  |  Hyphomonas jannaschiana  |  5' GATATC 
  3' CTATAG  |  5' ---GAT   ATC--- 3' 
  3' ---CTA   TAG--- 5'  |  | 
|  HpaI  |  |  Haemophilus parainfluenzae  |  5' GTTAAC 
  3' CAATTG  |  5' ---GTT   AAC--- 3' 
  3' ---CAA   TTG--- 5'  |  | 
|  HpaII  |  |  Haemophilus parainfluenzae  |  5' CCGG 
  3' GGCC  |  5' ---C   CGG--- 3' 
  3' ---GGC   C--- 5'  |  | 
|  HphI  |  |  Haemophilus parahaemolyticus  |  5' GGTGA 
  3' CCACT  |  5' ---GGTGAN6NN   --- 3' 
  3' ---CCACTN6N   N--- 5'  | AsuHPI, SspD5I | 
|  Hpy8I  |  |  Helicobacter pylori A 8-5  |  5' GTNNAC 
  3' CANNTG  |  5' ---GTN   NAC--- 3' 
  3' ---CAN   NTG--- 5'  |  | 
|  Hpy51I  |  |  Helicobacter pylori 51  |  5' GTSAC 
  3' CASTG  |  5' ---   GTSAC--- 3' 
  3' ---CASTG   --- 5'  |  | 
|  Hpy99I  |  3GOX  |  Helicobacter pylori J99  |  5' CGWCG 
  3' GCWGC  |  5' ---CGWCG   --- 3' 
  3' ---   GCWGC--- 5'  |  | 
|  Hpy178III  |  |  Helicobacter pylori J178  |  5' TCNNGA 
  3' AGNNCT  |  5' ---TC   NNGA--- 3' 
  3' ---AGNN   CT--- 5'  |  | 
|  Hpy188I  |  |  Helicobacter pylori J188  |  5' TCNGA 
  3' AGNCT  |  5' ---TCN   GA--- 3' 
  3' ---AG   NCT--- 5'  |  | 
|  Hpy188III  |  |  Helicobacter pylori J188  |  5' TCNNGA 
  3' AGNNCT  |  5' ---TC   NNGA--- 3' 
  3' ---AGNN   CT--- 5'  |  | 
|  HpyAV  |  |  Helicobacter pylori 26695  |  5' CCTTC 
  3' GGAAG  |  5' ---CCTTCN4NN   --- 3' 
  3' ---GGAAGN4N   N--- 5'  |  | 
|  HpyBI  |  |  Helicobacter pylori Roberts  |  5' GTAC 
  3' CATG  |  5' ---GT   AC--- 3' 
  3' ---CA   TG--- 5'  | AfaI, Csp6I, CviQI, CviRII, PabI, PlaAII, RsaI, RsaNI | 
|  HpyBII  |  |  Helicobacter pylori Roberts  |  5' GTNNAC 
  3' CANNTG  |  5' ---GTN   NAC--- 3' 
  3' ---CAN   NTG--- 5'  |  | 
|  HpyCI  |  |  Helicobacter pylori  |  5' GATATC 
  3' CTATAG  |  5' ---GAT   ATC--- 3' 
  3' ---CTA   TAG--- 5'  |  | 
|  HpyC1I  |  |  Helicobacter pylori  |  5' CCATC 
  3' GGTAG  |  5' ---CCATCNNNN   N--- 3' 
  3' ---GGTAGNNNNN   --- 5'  |  | 
|  HpyCH4I  |  |  Helicobacter pylori CH4  |  5' CATG 
  3' GTAC  |  5' ---CATG   --- 3' 
  3' ---   GTAC--- 5'  |  | 
|  HpyCH4III  |  |  Helicobacter pylori CH4  |  5' ACNGT 
  3' TGNCA  |  5' ---ACN   GT--- 3' 
  3' ---TG   NCA--- 5'  |  | 
|  HpyCH4IV  |  |  Helicobacter pylori CH4  |  5' ACGT 
  3' TGCA  |  5' ---A   CGT--- 3' 
  3' ---TGC   A--- 5'  |  | 
|  HpyCH4V  |  |  Helicobacter pylori CH4  |  5' TGCA 
  3' ACGT  |  5' ---TG   CA--- 3' 
  3' ---AC   GT--- 5'  |  | 
|  HpyF10VI  |  |  Helicobacter pylori RFL10  |  5' GCN7GC 
  3' CGN7CG  |  5' ---GCNNNNN   NNGC--- 3' 
  3' ---CGNN   NNNNNCG--- 5'  |  | 
|  HpyF44III  |  |  Helicobacter pylori RFL44  |  5' TGCA 
  3' ACGT  |  5' ---TG   CA--- 3' 
  3' ---AC   GT--- 5'  |  | 
|  HsoI  |  |  Haemophilus somnus 2336  |  5' GCGC 
  3' CGCG  |  5' ---G   CGC--- 3' 
  3' ---CGC   G--- 5'  | AspLEI, BstHHI, CfoI, FnuDIII, Hin6I, HinP1I, HspAI, SciNI | 
|  Hsp92I  |  |  Haemophilus sp. 92  |  5' GRCGYC 
  3' CYGCRG  |  5' ---GR   CGYC--- 3' 
  3' ---CYGC   RG--- 5'  | AcyI, AhaII, AosII, AstWI, HgiI, HgiDI, HgiHII, Hin1I, Hsp92I | 
|  Hsp92II  |  |  Haemophilus sp. 92  |  5' CATG 
  3' GTAC  |  5' ---CATG   --- 3' 
  3' ---   GTAC--- 5'  |  | 
|  HspAI  |  |  Haemophilus sp. A  |  5' GCGC 
  3' CGCG  |  5' ---G   CGC--- 3' 
  3' ---CGC   G--- 5'  | AspLEI, BspLAI, BstHHI, FnuDIII, HhaI, Hin6I, HinP1I, HsoI, SciNI | 
|  HsuI  |  |  Haemophilus suis  |  5' AAGCTT 
  3' TTCGAA  |  5' ---A   AGCTT--- 3' 
  3' ---TTCGA   A--- 5'  |  |