| Species | Count |
| Amborella trichopoda |
1 |
| Arabidopsis thaliana |
2 |
| Bacteroides thetaiotaomicron |
1 |
| Batrachochytrium dendrobatidis |
1 |
| Brachypodium distachyon |
1 |
| Bradyrhizobium diazoefficiens |
1 |
| Brassica campestris |
2 |
| Candida albicans |
1 |
| Capsicum annuum |
1 |
| Chlamydomonas reinhardtii |
1 |
| Chloroflexus aurantiacus |
1 |
| Citrus sinensis |
1 |
| Cryptococcus neoformans |
1 |
| Cucumis sativus |
1 |
| Deinococcus radiodurans |
1 |
| Dictyoglomus turgidum |
1 |
| Emericella nidulans |
1 |
| Eremothecium gossypii |
1 |
| Erythranthe guttata |
1 |
| Escherichia coli |
1 |
| Eucalyptus grandis |
2 |
| Geobacter sulfurreducens |
1 |
| Glycine max |
1 |
| Gossypium hirsutum |
2 |
| Haemophilus influenzae |
1 |
| Halobacterium salinarum |
1 |
| Helianthus annuus |
2 |
| Hordeum vulgare subsp. vulgare |
1 |
| Juglans regia |
2 |
| Klebsormidium nitens |
1 |
| Lactuca sativa |
1 |
| Leptospira interrogans |
1 |
| Manihot esculenta |
1 |
| Marchantia polymorpha |
1 |
| Methanocaldococcus jannaschii |
1 |
| Methanosarcina acetivorans |
1 |
| Monosiga brevicollis |
1 |
| Musa acuminata subsp. malaccensis |
1 |
| Mycobacterium tuberculosis |
1 |
| Neisseria meningitidis serogroup b |
1 |
| Nelumbo nucifera |
1 |
| Neosartorya fumigata |
1 |
| Neurospora crassa |
1 |
| Nicotiana tabacum |
3 |
| Nitrosopumilus maritimus |
1 |
| Oryza sativa |
1 |
| Phaeosphaeria nodorum |
1 |
| Physcomitrella patens |
1 |
| Phytophthora ramorum |
1 |
| Plasmodium falciparum |
1 |
| Prunus persica |
2 |
| Pseudomonas aeruginosa |
2 |
| Puccinia graminis |
1 |
| Rhodopirellula baltica |
1 |
| Ricinus communis |
1 |
| Saccharomyces cerevisiae |
1 |
| Salmonella typhimurium |
1 |
| Schizosaccharomyces japonicus |
1 |
| Schizosaccharomyces pombe |
1 |
| Sclerotinia sclerotiorum |
1 |
| Selaginella moellendorffii |
4 |
| Setaria italica |
1 |
| Shewanella oneidensis |
1 |
| Solanum lycopersicum |
1 |
| Solanum tuberosum |
1 |
| Sorghum bicolor |
1 |
| Spinacia oleracea |
1 |
| Staphylococcus aureus |
1 |
| Streptomyces coelicolor |
1 |
| Sulfolobus solfataricus |
1 |
| Synechocystis |
1 |
| Thalassiosira pseudonana |
1 |
| Theobroma cacao |
1 |
| Thermococcus kodakaraensis |
1 |
| Thermodesulfovibrio yellowstonii |
2 |
| Triticum aestivum |
3 |
| Ustilago maydis |
1 |
| Vibrio cholerae |
1 |
| Vitis vinifera |
2 |
| Xanthomonas campestris |
2 |
| Yarrowia lipolytica |
1 |
| Yersinia pestis |
1 |
| Zea mays |
1 |
| Zostera marina |
2 |
Histidine biosynthesis
Histidinol phosphate aminotransferase
