Wohlt J E, Clark J H, Derrig R G, Davis C L
J Dairy Sci. 1977 Dec;60(12):1875-82. doi: 10.3168/jds.S0022-0302(77)84118-0.
Valine, leucine, and isoleucine were extracted by the lactating bovine mammary gland in excess of outputs in milk protein. Carbon-14 uniformly labeled L-valine, L-leucine or L-isoleucine were catabolized when incubated in vitro with lactating bovine mammary tissue slices. The pathways of degradation of these amino acids by mammary tissue appear to be those common to other tissues. These amino acids represent a potential source of energy to the mammary gland as well as a source of carbon and alpha-amino nitrogen for synthesis of nonessential amino acids.
缬氨酸、亮氨酸和异亮氨酸被泌乳的牛乳腺摄取的量超过了它们在乳蛋白中的产出量。当用碳-14均匀标记的L-缬氨酸、L-亮氨酸或L-异亮氨酸与泌乳的牛乳腺组织切片在体外进行孵育时，它们会被分解代谢。乳腺组织对这些氨基酸的降解途径似乎与其他组织相同。这些氨基酸是乳腺潜在的能量来源，也是合成非必需氨基酸的碳源和α-氨基氮源。
