Table 2.

Physical properties, molecular weight, and concentration of whey proteins in milk.

Milk Proteins (Whey Proteins)	% of Whey Protein	Isoelectric Point (pI)	Concentration (g/L)	Molecular Weight (kDa)	References
β-lactoglobulin	55–65	5.35–5.49	3.3	18.4	[2,24]
α-lactalbumin	15–25	4.2–4.5	1.2	14.2	[2,24]
Bovine serum albumin (BSA)	5–6	5.1	0.3	66.3	[2,24]
Immunoglobulins	10–15	5.5–8.3	0.5	80–900	[2,24]
Proteose peptones	10–20	5.1–6.0	0.2	4.1–80	[2,24]