Table 2.

Protein content of yak milk (12, 41, 72, 74–77).

Protein	Concentration (g/100 g milk)
Total protein	4.5–5.5
Casein	3.2–4.0
Whey protein	0.7–1.2
αs1-Casein	0.8–1.2
αs2-Casein	0.3–0.7
β-Casein	1.7–2.3
κ-Casein	0.4–0.7
α-Lactalbumin	0.2–0.4
β-Lactoglobulin	0.4–0.7
Serum albumin (mg/100 g)	77–165
Lactoferrin (mg/kg)	200–700
Immunoglobulins (mg/kg)	100–400