time course studies showed that casein synthesis in cultured tissue decreased rapidly during the first 2 d despite the presence of the three hormones , but on the 3rd d tissue cultured with either insulin and prolactin or all three hormones regained the ability to synthesize milk proteins , casein , and alpha-lactalbumin : a greater increase occurred in the three hormone system .
C0026138
milk proteins
C0007332
casein