| [B] Acidobacteria bacterium (strain Ellin345) | ACIBL01827 | Q1IQL7 | GTP cyclohydrolase I |
| [B] Acidobacterium capsulatum (strain ATCC 51196 / DSM 11244 / JCM 7670) | ACIC502873 | C1F4J2 | GTP cyclohydrolase family protein |
| [B] Aquifex aeolicus | AQUAE00649 | QUEF_AQUAE | NADPH-dependent 7-cyano-7-deazaguanine reductase |
| [B] Hydrogenobaculum sp. (strain Y04AAS1) | HYDS001173 | B4U9Q5 | 7-cyano-7-deazaguanine reductase |
| [B] Chlorobaculum parvum (strain NCIB 8327) | CHLP800543 | QUEF_CHLP8 | 7-cyano-7-deazaguanine reductase |
| [B] Chlorobium tepidum | CHLTE01612 | QUEF_CHLTE | NADPH-dependent 7-cyano-7-deazaguanine reductase |
| [B] Chlorobium chlorochromatii (strain CaD3) | CHLCH01720 | QUEF_CHLCH | conserved hypothetical protein |
| [B] Chlorobium limicola (strain DSM 245 / NBRC 103803) | CHLL200584 | B3EH15 | 7-cyano-7-deazaguanine reductase |
| [B] Chlorobium phaeobacteroides (strain BS1) | CHLPB00542 | QUEF_CHLPB | 7-cyano-7-deazaguanine reductase |
| [B] Chlorobium phaeobacteroides (strain DSM 266) | CHLPD00526 | QUEF_CHLPD | GTP cyclohydrolase I PFAM: GTP cyclohydrolase I KEGG: plt:Plut_1627 hypothetical protein |
| [B] Prosthecochloris vibrioformis (strain DSM 265) | PROVI01396 | QUEF_PROVI | GTP cyclohydrolase I PFAM: GTP cyclohydrolase I KEGG: plt:Plut_1627 hypothetical protein |
| [B] Chloroherpeton thalassium (strain ATCC 35110 / GB-78) | CHLT302608 | QUEF_CHLT3 | 7-cyano-7-deazaguanine reductase |
| [B] Pelodictyon luteolum (strain DSM 273) | PELLD01580 | QUEF_PELLD | conserved hypothetical protein |
| [B] Pelodictyon phaeoclathratiforme (strain DSM 5477 / BU-1) | PELPB00613 | QUEF_PELPB | 7-cyano-7-deazaguanine reductase |
| [B] Prosthecochloris aestuarii (strain DSM 271 / SK 413) | PROA200503 | QUEF_PROA2 | 7-cyano-7-deazaguanine reductase |
| [B] Thermomicrobium roseum (strain ATCC 27502 / DSM 5159 / P-2) | THERP01620 | QUEF_THERP | GTP cyclohydrolase family protein |
| [B] Cyanothece sp. (strain PCC 7425 / ATCC 29141) | CYAP400032 | B8HRW7 | 7-cyano-7-deazaguanine reductase |
| [B] Gloeobacter violaceus | GLOVI03576 | QUEF_GLOVI | hypothetical protein |
| [B] Microcystis aeruginosa (strain NIES-843) | MICAN03552 | QUEF_MICAN | NADPH-dependent 7-cyano-7-deazaguanine reductase |
| [B] Synechococcus sp. (strain CC9311) | SYNS302282 | Q0I7P6 | GTP cyclohydrolase I family enzyme |
| [B] Synechococcus sp. (strain CC9605) | SYNSC02156 | QUEF_SYNSC | conserved hypothetical protein |
| [B] Synechococcus sp. (strain CC9902) | SYNS900464 | QUEF_SYNS9 | conserved hypothetical protein |
| [B] Synechococcus sp. (strain RCC307) | SYNR301892 | A5GV88 | Possible enzyme related to GTP cyclohydrolase I |
| [B] Synechococcus sp. (strain WH7803) | SYNPW02029 | A5GNE3 | Possible enzyme related to GTP cyclohydrolase I |
| [B] Synechococcus sp. (strain WH8102) | SYNPX00463 | QUEF_SYNPX | NADPH-dependent 7-cyano-7-deazaguanine reductase |
| [B] Synechocystis sp. (strain PCC 6803) | SYNY302755 | QUEF_SYNY3 | NADPH-dependent 7-cyano-7-deazaguanine reductase |
| [B] Trichodesmium erythraeum (strain IMS101) | TRIEI01755 | QUEF_TRIEI | GTP cyclohydrolase I |
| [B] Prochlorococcus marinus | PROMA01610 | QUEF_PROMA | GTP cyclohydrolase I family enzyme |
| [B] Prochlorococcus marinus (strain MIT 9211) | PROM401580 | A9BCE9 | GTP cyclohydrolase I-like protein |
| [B] Prochlorococcus marinus (strain MIT 9215) | PROM201724 | QUEF_PROM2 | GTP cyclohydrolase I-like protein |
| [B] Prochlorococcus marinus (strain MIT 9301) | PROM001651 | QUEF_PROM0 | GTP cyclohydrolase I-like enzyme COG780 Enzyme related to GTP cyclohydrolase I [General function prediction only] |
| [B] Prochlorococcus marinus (strain MIT 9303) | PROM300461 | QUEF_PROM3 | GTP cyclohydrolase I-like protein |
| [B] Prochlorococcus marinus (strain MIT 9312) | PROM901701 | QUEF_PROM9 | NADPH-dependent 7-cyano-7-deazaguanine reductase |
| [B] Prochlorococcus marinus (strain MIT 9313) | PROMM01471 | QUEF_PROMM | conserved hypothetical protein |
| [B] Prochlorococcus marinus (strain MIT 9515) | PROM501632 | QUEF_PROM5 | GTP cyclohydrolase I-like protein COG780 Enzyme related to GTP cyclohydrolase I [General function prediction only] |
| [B] Prochlorococcus marinus (strain NATL1A) | PROM101833 | A2C4K6 | GTP cyclohydrolase I-like protein |
| [B] Prochlorococcus marinus (strain NATL2A) | PROMT01785 | QUEF_PROMT | NADPH-dependent 7-cyano-7-deazaguanine reductase |
| [B] Prochlorococcus marinus subsp. pastoris (strain CCMP1986 / MED4) | PROMP01693 | QUEF_PROMP | NADPH-dependent 7-cyano-7-deazaguanine reductase |
| [B] Thiobacillus denitrificans (strain ATCC 25259) | THIDA01226 | QUEF_THIDA | conserved hypothetical protein |
| [B] Methylobacillus flagellatus (strain KT / ATTC 51484 / DSM 6875) | METFK01253 | QUEF_METFK | GTP cyclohydrolase I |
| [B] Nitrosomonas europaea | NITEU02200 | QUEF_NITEU | conserved hypothetical protein |
| [B] Nitrosomonas eutropha (strain C71) | NITEC01992 | QUEF_NITEC | GTP cyclohydrolase I PFAM: GTP cyclohydrolase I KEGG: neu:NE2285 hypothetical protein |
| [B] Nitrosospira multiformis (strain ATCC 25196 / NCIMB 11849) | NITMU00623 | QUEF_NITMU | GTP cyclohydrolase I |
| [B] Desulfatibacillum alkenivorans (strain AK-01) | DESAA03141 | B8FGI2 | 7-cyano-7-deazaguanine reductase |
| [B] Desulfococcus oleovorans (strain DSM 6200 / Hxd3) | DESOH02184 | A8ZUH0 | GTP cyclohydrolase I |
| [B] Anaeromyxobacter sp. (strain Fw109-5) | ANADF00326 | QUEF_ANADF | GTP cyclohydrolase I |
| [B] Anaeromyxobacter sp. (strain K) | ANASK04166 | QUEF_ANASK | 7-cyano-7-deazaguanine reductase |
| [B] Myxococcus xanthus (strain DK 1622) | MYXXD06064 | Q1CYT2 | GTP cyclohydrolase family protein identified by match to protein family HMM PF01227 |
| [B] Syntrophus aciditrophicus (strain SB) | SYNAS01491 | QUEF_SYNAS | enzyme related to GTP cyclohydrolase I |
| [B] Arcobacter butzleri (strain RM4018) | ARCB400005 | A8EQT4 | 7-cyano-7-deazaguanine reductase |
| [B] Campylobacter jejuni | CAMJE01636 | QUEF_CAMJE | NADPH-dependent 7-cyano-7-deazaguanine reductase |
| [B] Campylobacter jejuni (strain RM1221) | CAMJR01827 | QUEF_CAMJR | identified by match to protein family HMM PF01227 GTP cyclohydrolase I family protein |
| [B] Campylobacter jejuni subsp. doylei (strain ATCC BAA-1458 / RM4099 / 269.97) | CAMJD01704 | QUEF_CAMJD | NADPH-dependent 7-cyano-7-deazaguanine reductase |
| [B] Campylobacter jejuni subsp. jejuni serotype O:23/36 (strain 81-176) | CAMJJ01636 | QUEF_CAMJJ | GTP cyclohydrolase I family protein identified by match to protein family HMM PF01227; match to protein family HMM TIGR03139 |
| [B] Campylobacter jejuni subsp. jejuni serotype O:6 (strain 81116 / NCTC 11828) | CAMJ801620 | QUEF_CAMJ8 | Putative uncharacterized protein |
| [B] Campylobacter lari (strain RM2100 / D67 / ATCC BAA-1060) | CAMLR00006 | QUEF_CAMLR | Putative uncharacterized protein |
| [B] Sulfurimonas denitrificans (strain ATCC 33889 / DSM 1251) | SULDN00004 | QUEF_SULDN | NADPH-dependent 7-cyano-7-deazaguanine reductase |
| [B] Wolinella succinogenes | WOLSU00004 | QUEF_WOLSU | HYPOTHETICAL PROTEIN CJ1724C conserved hypothetical protein |
| [B] Nautilia profundicola (strain ATCC BAA-1463 / DSM 18972 / AmH) | NAUPA00004 | B9L738 | 7-cyano-7-deazaguanine reductase |
| [B] Nitratiruptor sp. (strain SB155-2) | NITSB00005 | QUEF_NITSB | GTP cyclohydrolase I |
| [B] Sulfurovum sp. (strain NBC37-1) | SULNB00139 | QUEF_SULNB | GTP cyclohydrolase I |
| [B] Nitrosococcus oceani (strain ATCC 19707 / NCIMB 11848) | NITOC01592 | QUEF_NITOC | GTP cyclohydrolase I |
| [B] Halorhodospira halophila (strain DSM 244 / SL1) | HALHL01848 | QUEF_HALHL | GTP cyclohydrolase I |
| [B] Thioalkalivibrio sp. (strain HL-EbGR7) | THISH01994 | QUEF_THISH | 7-cyano-7-deazaguanine reductase |
| [B] Methylococcus capsulatus | METCA02291 | QUEF_METCA | identified by similarity to OMNI:NT01MC2047; match to protein family HMM PF01227 Hypothetical protein |
| [B] Ruthia magnifica subsp. Calyptogena magnifica | RUTMC00431 | QUEF_RUTMC | GTP cyclohydrolase I |
| [B] Vesicomyosocius okutanii subsp. Calyptogena okutanii (strain HA) | VESOH00422 | QUEF_VESOH | GTP cyclohydrolase I |
| [B] Magnetococcus sp. (strain MC-1) | MAGSM03252 | QUEF_MAGSM | GTP cyclohydrolase I PFAM: GTP cyclohydrolase I KEGG: noc:Noc_1696 GTP cyclohydrolase I |
| [B] Leptospira biflexa serovar Patoc (strain Patoc 1 / ATCC 23582 / Paris) | LEPBP01574 | B0SR20 | Putative uncharacterized protein |
| [B] Leptospira biflexa serovar Patoc (strain Patoc 1 / Ames) | LEPBA01525 | B0SHL2 | GTP cyclohydrolase-1 related protein |
| [B] Leptospira borgpetersenii serovar Hardjo-bovis (strain JB197) | LEPBJ01650 | QUEF_LEPBJ | GTP cyclohydrolase-1 related protein cytoplasmic protein |
| [B] Leptospira borgpetersenii serovar Hardjo-bovis (strain L550) | LEPBL01153 | QUEF_LEPBL | GTP cyclohydrolase-1 related protein cytoplasmic protein |
| [B] Leptospira interrogans | LEPIN02068 | QUEF_LEPIN | NADPH-dependent 7-cyano-7-deazaguanine reductase |
| [B] Leptospira interrogans (serogroup Icterohaemorrhagiae / serovar Copenhageni) | LEPIC01770 | QUEF_LEPIC | identified by sequence similarity; putative; ORF located using Blastx/Glimmer conserved hypothetical protein |
| [B] Thermotoga maritima | THEMA00781 | QUEF_THEMA | NADPH-dependent 7-cyano-7-deazaguanine reductase |
| [B] Thermotoga petrophila (strain RKU-1 / ATCC BAA-488 / DSM 13995) | THEP100138 | QUEF_THEP1 | NADPH-dependent 7-cyano-7-deazaguanine reductase |
| [B] Thermotoga sp. (strain RQ2) | THESQ00135 | QUEF_THESQ | 7-cyano-7-deazaguanine reductase precursor |
| [B] Opitutus terrae (strain DSM 11246 / PB90-1) | OPITP00280 | B1ZQ92 | 7-cyano-7-deazaguanine reductase |
| [B] Akkermansia muciniphila (strain ATCC BAA-835) | AKKM801852 | B2UN89 | 7-cyano-7-deazaguanine reductase |
| [B] Elusimicrobium minutum (strain Pei191) | ELUMP01124 | QUEF_ELUMP | 7-cyano-7-deazaguanine reductase precursor |