Figure 1.

Properties of the collagen protein hydrolysates. (A) Surface hydrophobicity (H₀), (B) SDS-PAGE protein profile, (C) zeta potential, and (D) mean particle size of the collagen hydrolysates produced by Alcalase, trypsin, Neutrase, Flavourzyme, pepsin and papain. Mean values with different letters in (C) and (D) are significantly different with p < 0.05. SDS-PAGE label: Lanes I: High molecular-weight protein marker, A = Acid-solubilized collagen (ASC), B = Pepsin-solubilized collagen (PSC), and collagen hydrolysates obtained using C = trypsin, D = Alcalase, E = Flavourzyme, F = Neutrase, G = pepsin, and H = papain.