| KEGG ID | KO | Definition |
| gan:UMN179_01892 | ICEA Protein | |
| nla:NLA_1690 | type ii restriction enzyme nlaIII (ec 3.1.21.4) (endonuclease nlaIII) (r.nlaIII) | |
| heo:C694_06260 | ulcer-associated gene restriction endonuclease (iceA) | |
| hhr:HPSH417_05935 | ulcer-associated gene restriction endonuclease (iceA) | |
| hpp:HPP12_1174 | K01155 | type II R-M system restriction endonuclease |
| hpc:HPPC_05910 | ulcer-associated gene restriction endonuclease (iceA) | |
| hpm:HPSJM_06045 | ulcer-associated gene restriction endonuclease (iceA) | |
| hpf:HPF30_0184 | ulcer-associated gene restriction endonuclease | |
| heq:HPF32_1141 | ulcer-associated gene restriction endonuclease | |
| hex:HPF57_1171 | Type II restriction enzyme | |
| hpz:HPKB_1145 | hypothetical protein | |
| hpx:HMPREF0462_1221 | ICEA Protein | |
| heu:HPPN135_06205 | ulcer-associated gene restriction endonuclease | |
| hes:HPSA_06610 | ulcer-associated protein restriction endonuclease (iceA) | |
| hpd:KHP_1105 | type II restriction endonuclease | |
| hey:MWE_1410 | ulcer-associated protein restriction endonuclease (IceA) | |
| her:C695_06270 | ulcer-associated gene restriction endonuclease (iceA) | |
| hei:C730_06265 | ulcer-associated gene restriction endonuclease (iceA) | |
| hpya:HPAKL117_05725 | ulcer-associated protein restriction endonuclease (iceA) | |
| hpyo:HPOK113_1166 | Type II restriction enzyme | |
| hpyr:K747_04975 | HNH endonuclease | |
| hpym:K749_07735 | HNH endonuclease | |
| hem:K748_06170 | HNH endonuclease | |
| heb:U063_0138 | iceA | |
| hez:U064_0138 | ulcer-associated gene restriction endonuclease | |
| hhe:HH_1051 | conserved hypothetical protein | |
| hac:Hac_0305 | ulcer-associated gene restriction endonuclease | |
| hcp:HCN_0106 | putative IceA1-like restriction endonuclease | |
| caj:CIG1485E_0340 | IceA family protein | |
| chv:CHELV3228_0391 | IceA family protein |