Assertion: catechin | /r/HasProperty | oxidized by polyphenol oxidase
Facets:
value: during the oxidation process
type: TEMPORAL
value: enzymatically
type: MANNER
Source sentences:
text: When catechins are enzymatically oxidized by polyphenol oxidase during the oxidation process that yields black tea, they form low molecular weight dimers known as theaflavins (see Figure 3) and complex polymers (of mostly unknown structures) called thearubigins.