Table 1.

DPP-4 inhibitory activity of PPPH’s and their SGID equivalents

Proteolytic activity	IC50 value (mg/ml)
	PPPH	PPPH-SGID
Control (none)	1.91 ± 0.10d	1.09 ± 0.06bc,*
Alcalase + Flavourzyme	0.70 ± 0.02a	1.00 ± 0.03bc,*
Alcalase	0.94 ± 0.10b	1.14 ± 0.05c,*
Bromelain	1.34 ± 0.05c	0.95 ± 0.08b,*
Promod	1.23 ± 0.05c	0.78 ± 0.02a,*

Mean ± SD (n=3), IC₅₀: inhibitory concentration that inhibits enzyme activity by 50%. *Indicates a significant difference (p< 0.05) in IC₅₀ values following SGID