Figure 2.

Distribution of known DPP-IV inhibitory peptides. Red dot: tripeptide IPI. Blue square: dipeptide Gly-Pro (GP). (A) 3D distribution of 222 peptides based on their IC₅₀, MW, and GRAVY values; (B) distribution of 222 peptides according to IC₅₀ and MW; (C) distribution of peptides according to IC₅₀ and GRAVY values; (D) distribution of peptides according to MW and GRAVY values; and (E) and (F) MW and GRAVY value distributions of the 222 peptides, respectively, based on the total number of peptides.