Table 5. Inhibition effect on the tyrosinase of extracts from each part of Akebia quinata

Samples¹⁾	Tyrosinase inhibition (%)					IC₅₀ values (μg/mL)
Samples¹⁾	62.5 μg/mL	125 μg/mL	250 μg/mL	500 μg/mL	1,000 μg/mL	IC₅₀ values (μg/mL)
AFW	32.41±0.15^3)g4)	35.84±0.33^g	42.58±0.17^g	47.15±0.13^g	52.04±0.25^g	694.82±3.66^a
ALW	37.77±0.16^d	40.23±0.12^d	48.71±0.27^d	55.44±0.15^c	62.54±0.22^c	350.38±0.57^d
ASW	36.28±0.17^e	38.69±0.19^f	45.44±0.31^e	51.79±0.25^e	57.91±0.28^e	374.27±2.01^c
AFE	34.32±0.24^f	39.72±0.20^e	44.47±0.25^f	50.38±0.24^f	54.65±0.18^f	382.42±2.53^b
ALE	40.25±0.11^b	43.95±0.26^b	51.61±0.18^b	56.59±0.17^b	64.33±0.13^b	196.16±0.98^f
ASE	38.97±0.26^c	41.48±0.28^c	49.26±0.08^c	53.70±0.15^d	60.57±0.16^d	305.60±0.69^e
Ascorbic acid²⁾	44.43±0.20^a	53.24±0.34^a	62.59±0.19^a	73.52±0.23^a	80.37±0.21^a	105.65±3.92^g

AFW, extracts from Akebia quinata fruit by hot-water; ALW, extracts from Akebia quinata leaf by hot-water; ASW, extracts from Akebia quinata stem by hot-water; AFE, extracts from Akebia quinata fruit by 70% ethanol; ALE, extracts from Akebia quinata leaf by 70% ethanol; ASE, extracts from Akebia quinata stem by 70% ethanol.
Ascorbic acid was used as a positive control substance.
All values are mean±SD (n=5).
Means with different superscript letters (^a-g) in the same column are significantly different at p<0.05 by Duncan’s multiple range test (a>b>c>d>e>f>g).