Fig. 3.

Superoxide-scavenging activities of (A) camel milk protein (CMP) fractions and (B) their peptic hydrolysates measured in xanthine/XOD/NBT reduction assay at 100 μg/mL protein. The rate of O₂^•− accumulation measured in real-time kinetics was presented as the rate of absorbance change at 562 nm due to NBT reduction at 37 °C for 20 min. The 2,2-diphenyl-1-picrylhydrazyl (DPPH) reduction of the fractions are shown above the panels. XOD = xanthine oxidase; NBT = nitroblue tetrazolium; CWP = camel whey proteins; CCP = camel casein proteins; P-CMP = pepsin digested CMP; P-CWP = pepsin digested CWP; P-CCP = pepsin digested CCP.