Table 3 The effect of heat treatment on the mitrogen distribution of skim milk

	Un-heated	63℃, min	135℃, 1~3 sec
	(%)
Total N	100	100	100
Casein N	75.0	77.2	88.8
Non-casein N	25.0	22.8	11.2
Non-casein protein N	18.9	17.0	5.3
Total albumin N	13.2	12.0	3.0
β-Lactoglobulin N	7.2	6.6	0.7
α-Lactalbumin and serum albumin N	6.0	5.4	2.3
Protease․peptone and globulin N	5.7	5.0	2.3
Non-protein N	6.1	5.8	5.9

Adpated from Shillam et al., 1960.