| KEGG ID | KO | Definition |
| hit:NTHI1786 | type II restriction enzyme HaeII | |
| hil:HICON_16870 | Type II restriction enzyme HaeII | |
| hih:NF38_06680 | restriction endonuclease HaeII | |
| hiw:NTHI477_00287 | HaeII restriction endonuclease | |
| hix:NTHI723_00205 | HaeII restriction endonuclease | |
| blep:AL038_12700 | HaeII family restriction endonuclease | |
| nmi:NMO_0083 | putative type II restriction endonuclease | |
| ngk:NGK_2248 | putative NgoI restriction endonuclease |