Changes

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== Biosynthesis ==

= Biosynthesis =

'''''Synthesis of Lactose'''''

== Synthesis of Lactose ==

 

1. In the cytosol of the mammary cell, glucose is converted to UDP- glucose. UDP glucose is then epimerised by the enzyme '''epimerase''' to form UDP galactose.

1. In the cytosol of the mammary cell, glucose is converted to UDP- glucose. UDP glucose is then epimerised by the enzyme '''epimerase''' to form UDP galactose.

'''''Synthesis of the Fat Component'''''

== Synthesis of the Fat Component ==

 

The mammary gland synthesised triacylglycerol from glycerol and three fatty acids.  The fatty acids originate from triacyclglycerol in plasma lipoproteins (60%) or from synthesis in the mammary gland (40%).

The mammary gland synthesised triacylglycerol from glycerol and three fatty acids.  The fatty acids originate from triacyclglycerol in plasma lipoproteins (60%) or from synthesis in the mammary gland (40%).

'''''Synthesis of Protein'''''

== Synthesis of Protein ==

 

1. Polypeptide chains are synthesised on the rough endoplasmic reticulem from amino acids in the blood.

1. Polypeptide chains are synthesised on the rough endoplasmic reticulem from amino acids in the blood.