Table 1.
Factors and levels of experiment for enzyme-assisted extraction of anthocyanin from Bokbunja.

Factors	Code value
		-1	0	1
	Concentration of Pectinex Ultra SP-L (mL/100 L)	X1	0.5	1.0	1.5
Reaction temperature (°C)	X2	20	40	60
Reaction time (hr)	X3	2	5	8