Table 1. Summary of the biochemical properties of each rPPO-GFP and the corresponding rPPO.

		PPO1		PPO2		PPO3
		rPPO1	rPPO1-GFP	rPPO2	rPPO2-GFP	rPPO3	rPPO3-GFP
Cell staining	+Cu2+	Yes	Yes	Yes	Yes	Yes	Yes
	−Cu2+	No	No	No	No	Yes (Some cells)	Yes (Some cells)
Auto-melainzation	+Cu2+	No	No	No	No	Yes	Yes
	−Cu2+	No	No	No	No	Yes	Yes
PO activity	+Cu2+	Higher	Lower	Equal	Equal	Equal	Equal
	−Cu2+	No	No	No	No	Yes	Yes
Protein expression	+Cu2+	Yes	Yes	Yes	Yes	Yes	Yes
	−Cu2+	Yes	Yes	Yes	Yes	Yes	Yes