Animalia 2 Animals 2 Bos taurus 2 Bovinae 2 Casein genes 2 Caseins 2 Cattle 2 Female 2 Gene Expression 2 Gene expression 2 Human Growth Hormone 2 Human growth hormone 2 Humans 2 Lactation 2 Male 2 Mammary Glands, Animal 2 Mice 2 Mice, Inbred C57BL 2 Mice, Transgenic 2 Milk 2 Murinae 2 Mus musculus 2 Promoter Regions (Genetics) 2 Rodentia 2 Tissue Distribution 2 Transgenes 2 Transgenic mice 2 animal cell 2 animal experiment 2 article 2