Skip to main content
. 2009 Oct 14;4(10):e7462. doi: 10.1371/journal.pone.0007462

Table 3. Three types of Streptomyces PPOs and tentative distinctions.

Type Enzyme Location Monophenol oxidase activity Diphenol oxidase activity o-aminophenol oxidase activity Function Occurrence
I MelD2 Intracellular + + Detoxification Universal
II MelC2 Extracellular + + + Competition? Sporadic
III GriF Intracellular + + Biosynthesis Rare