| Status | Description | Organism | Genes | References |
|---|---|---|---|---|
| beta-carotene ketolase | Amycolicicoccus subflavus | GH9R-1335 | ||
| Beta-carotene ketolase | Cystobacter fuscus | G10TT-475 | ||
| beta-carotene ketolase | Erythrobacter litoralis | GHLE-679 | ||
| Beta-carotene ketolase | Fibrella aestuarina | crtO | ||
| beta-carotene ketolase | Gordonia amicalis | crtO | ||
| beta-carotene ketolase | Paraglaciecola arctica | crtO | ||
| beta-carotene ketolase | Gordonia effusa | crtO | ||
| putative beta-carotene ketolase CrtO | Gordonia polyisoprenivorans | crtO | ||
| beta-carotene ketolase | Gloeobacter violaceus | crtO | ||
| beta-carotene ketolase | Gloeobacter violaceus | crtO |