Institute of Dairy Science of Animal Sciences University 310058;
College of Animal Science and Technology A&F University 712100;
College of Animal Science and Technology Agricultural University 450046;
Key Laboratory of Molecular Animal Nutrition(Zhejiang University) of Education;
Mammalian Nutrition Physiology Genomics of Animal Sciences and Division of Nutritional Sciences of Illinois 61801.;
ELONGASE; Lipid homeostasis; Liver X receptor; Mammary gland; Polyunsaturated fatty acids;