Table 3.

Types and contents of proteins in different types of milk [1,10,16].

Types of Proteins	Yak	Cow	Buffalo	Goat
Total casein (g/100 g)	2.10–4.00	2.40–2.80	2.70–5.00	2.30–3.80
αS1-casein (mg/100 g)	416–1024	806–1508	1147–1924	135–1020
αS2-casein (mg/100 g)	288–576	182–390	222–629	270–750
β-casein (mg/100 g)	1184–1632	728–988	1295–1702	1020–1920
κ-casein (mg/100 g)	384–672	234–520	407–592	300–570
Total whey proteins (g/100 g)	1.10	0.50–0.70	0.60–1.00	0.30–1.20
α-lactalbumin (mg/100 g)	77–220	96–150	117–303	85–250
β-lactoglobulin (mg/100 g)	550–946	198–402	301–441	170–385
Serum albumin (mg/100 g)	77–165	36–45	2.1–35	25–110
Lactoferrin (mg/kg)	200–700	20–500	20–300	20–300
Immunoglobulins (mg/kg)	100–400	150–1000	500–1300	150–500
Lactoperoxidase (units/mL)	2.95	1.40	0.90	0.26–4.55