Table 1 The IC₅₀ values of the TYR inhibitory activity of BPPH derived from different enzymes.

L-Tyrosine (mono-phenolase activity) IC₅₀ (µg/mL)

1.0

139.90 ± 1.74^e

293.63 ± 2.05ⁱ

243.00 ± 5.50^h

69.76 ± 0.35^b

224.30 ± 10.10^g

2.5

136.60 ± 9.18^e

98.32 ± 0.19^c

223.97 ± 7.37^g

56.29 ± 0.44^a

189.90 ± 4.19^f

5.0

50.01 ± 1.15^a

53.69 ± 2.84^a

117.67 ± 2.16^d

51.57 ± 0.98^a

65.89 ± 5.92^b

L-DOPA (di-phenolase activity) IC₅₀ (µg/mL)

1.0

180.20 ± 4.92^f

286.30 ± 10.77ⁱ

174.70 ± 8.29^f

63.80 ± 159^c

275.93 ± 8.62^h

2.5

118.43 ± 6.10^d

48.19 ± 0.68^ab

158.20 ± 8.97^e

56.82 ± 2.82^bc

267.10 ± 4.69^h

5.0

39.93 ± 0.60^a

43.20 ± 5.78^a

65.54 ± 8.78^c

42.80 ± 1.15^a

248.40 ± 3.20^g