Assertion: dopa melanin | /r/CapableOf | give quinone
Facets:
Source sentences:
text: Catechol-melanins are formed by the catalytic action of plants catechol oxidases, giving quinones (Figure 8) similarly to the Raper-Mason pathway for tyrosinases, but obviously no cysteine is added to the pigment and no indolic units are either formed, in agreement with the sulfur and nitrogen economy in plants.