Proteins
The proteins in milk are of great quality, that is to say, they
contain all the essential amino acids, and elements that our
bodies cannot produce. It is important to remember that
proteins are the building blocks of all living tissue. Milk
proteins have roughly the same composition as the egg
protein, except for the amounts of methionine and cystine,
significantly lower. Indeed, the sulfur amino acids are the
limiting factors in milk. Casein and, even more, the complex
milk protein contains good proportion of all amino acids
essential for growth and maintenance (Konte, 1999). The
denomination crude protein (CP) includes protein (TP) and
non-protein nitrogen (including urea). The protein content
is an important feature of the milk. The TP determines the