Gabris J, Duran A
Vet Med (Praha). 1983 Aug;28(8):465-71.
The levels of free amino acids in cow's milk vary greatly. The highest value of 164.484 mumol/l was recorded in glutamic acid, followed by glycine, alanine, lysine, and the lowest values were found in cystine, methionine, phenylalanine, tyrosine and isoleucine (5--10 mumol/l). The levels of free amino acids in milk and their order differ from the values and the order in blood. For a large proportion of free amino acids, significant to highly significant relations exist between the levels in arterial blood and venous blood before and after milking. On the other hand, significant positive correlations were found only between the level of cystine in arterial blood and in venous blood after milking, between threonine level in arterial blood and in venous blood before milking, and a highly significant negative correlation was recorded between the leucine level in venous blood before milking and the respective value in milk.
牛奶中游离氨基酸的含量差异很大。谷氨酸的含量最高，为164.484微摩尔/升，其次是甘氨酸、丙氨酸、赖氨酸，胱氨酸、蛋氨酸、苯丙氨酸、酪氨酸和异亮氨酸的含量最低（5-10微摩尔/升）。牛奶中游离氨基酸的含量及其顺序与血液中的值和顺序不同。对于大部分游离氨基酸而言，挤奶前后动脉血和静脉血中的含量之间存在显著至极显著的关系。另一方面，仅发现挤奶后动脉血和静脉血中胱氨酸的含量之间、挤奶前动脉血和静脉血中苏氨酸的含量之间存在显著正相关，并且记录到挤奶前静脉血中亮氨酸的含量与牛奶中相应值之间存在极显著负相关。
