nubsella zeaxanthinifaciens nubsella zeaxanthinifaciens nubsella zeaxanthinifaciens is a gram-negative, strictly aerobic and rod-shaped bacterium from the genus of nubsella which has been isolated from freshwater in misasa in japan. nubsella zeaxanthinifaciens produces zeaxanthin. nubsella zeaxanthinifaciens scientific classification domain: bacteria phylum: bacteroidota class: sphingobacteriia order: sphingobacteriales family: sphingobacteriaceae genus: nubsella species: n. zeaxanthinifaciens binomial name nubsella zeaxanthinifaciensasker et al. 2008 type strain ccug 54348, nbrc 102579, tdma-5 synonyms pedobacter zeaxanthinifaciens