Characterization of fat globules and milk fat globule membrane proteins in milk of different yak breeds

Free Access

Table III.

Protein components in the MFGM obtained from different yak breeds.

Proteins		Percentage of total protein in MFGM (%)¹
Proteins	Molecular weight (kg·mol⁻¹)	Maiwa yak milk (n = 6)	Gannan yak milk (n = 4)	Zhongdian yak milk (n = 4)
Mucin 1	225.6	4.87 ± 0.54^a	4.54 ± 0.21^a	3.87 ± 0.27^b
Xanthine oxidase	157.4	16.31 ± 0.10^a	16.18 ± 0.87^a	16.27 ± 0.74^a
Periodic Acid Schiff III/IV	78–98	3.81 ± 0.45^a	3.09 ± 0.33^a	3.21 ± 0.29^a
Butyrophilin	67.5	25.43 ± 0.63^a	25.23 ± 0.74^a	22.32 ± 0.91^b
Periodic Acid Schiff 6	50.2	13.45 ± 0.18^a	13.01 ± 0.43^a	14.09 ± 0.24^a
Periodic Acid Schiff 7	47.8	13.46 ± 0.09^a	13.04 ± 0.48^a	14.94 ± 0.11^a
Other minor proteins		22.67 ± 3.00^a	23.91 ± 3.20^a	25.75 ± 1.80^a

Data are based solely on staining intensity.

Data are means ± sample standard deviations.

^a,b

Different superscripts within a row indicate significant differences (P ≤ 0.05).