TABLE 1.

Biochemical reactions of Methylobacterium and Roseomonas spp.^b

Test	Methylobacterium spp.	Roseomonas spp.
Oxidase	+	+
Oxidation of methanol	+	−
Growth
On MacConkey agar	−	+
At 42°C	−	+
Urease	+	+
UV absorption of coloniesa	+	−
Assimilation of acetamide	+	−
Colonial morphology	Dry, coral	Mucoid, pink
Gram stain morphology	Vacuolated rod	Coccoid rod

^aColonies appear dark when exposed to long-wave UV light. 

^bData from Koneman et al. (2).