Figure 4 Morphology of κ-casein species formed in the absence and in the presence of polyphenols (A) κ-casein aggregates (50 μM) formed at the end of the aggregation kinetics (B) κ-casein aggregates (50 μM) formed at the end of the aggregation kinetics in the presence of 120 μg/ml apple polyphenols. Scale bar=400 nm, z-range=5.3 nm (C) Distributions of lengths for the two sample populations.