Table 1 Comparison of de novo fatty acid synthesis (lipogenesis), fat deposition, and lipoproteins in various species

Items	Species
	Poultry (chicken)	Monogastric animals (pigs)	Rodents (rats, mice)	Ruminants(cattle)	Primates(humans)
Major site of lipogenesis	Liver	Adipocytes	Liver/Adipocytes	Adipocytes	Liver
Secondary site of lipogenesis	-	Liver	-	-	Adipocytes
Primary substrate for lipogenesis	Glucose	Glucose	Glucose	Acetate	Glucose
Major site of fat deposition	Visceral and abdominal fat,oocytes (laying hens)	Visceral, subcutaneous and intramuscular fat	Visceral and subcutaneous fat	Subcutaneous and intramuscular fat	Visceral and subcutaneous fat
Lipoprotein(protomicron/chylomicron)	Protomicron	Chylomicron	Chylomicron	Chylomicron	Chylomicron
	Intestine to blood	Intestine to lymph	Intestine to lymph	Intestine to lymph	Intestine to lymph
Lipoprotein(VLDL)	Liver to periphery and ovary	Liver to peripheral tissues	Liver to peripheral tissues	Liver to peripheral tissues	Liver to peripheral tissues
Others	Lipogenesis is important for egg formation.	-	-	Mammary gland is major site of lipogenesis in lactating ruminants.	-