Table 2.

Inhibition of yeast and mammalian α-glucosidases by the crude aqueous extracts and fractions of the fruits of F. deltoidea from two different varieties

Substrate	α-glucosidases inhibitory activities, IC50 (mg/ml)
	SF (var. angustifolia)			BF (var. kunstleri)			Acarbose
	SFC	SFE	SFW	BFC	BFE	BFW
Yeast α-glucosidase
pNPG	0.065 ± 0.005a	0.259 ± 0.014b	0.083 ± 0.006a	0.061 ± 0.003c	0.225 ± 0.008d	0.049 ± 0.003e	9.075 ± 0.065
Rat intestinal α-glucosidase
Sucrose	0.552 ± 0.013a	0.611 ± 0.020a	0.473 ± 0.011b	0.538 ± 0.016c	0.596 ± 0.015c	0.444 ± 0.004d	0.039 ± 0.001
pNPG	7.226 ± 0.389a	13.957 ± 0.238b	7.173 ± 0.170a	6.407 ± 0.102c	10.040 ± 0.291d	4.123 ± 0.136e	0.058 ± 0.001

Each value is expressed as a mean ± SD of triplicates from three different experiments. Values with different superscript letters between the same variety, within the same row are significantly different at p < 0.01. SFC, SFE and SFW indicate crude aqueous extract, ethyl acetate fraction and water fraction of SF (var. angustifolia). BFC, BFE and BFW indicate crude aqueous extract, ethyl acetate fraction and water fraction of BF (var. kuntsleri).