1. Proteins

2. Proteins Organic compounds made up of amino acids
Amino acids are the building blocks of proteins
Most expensive part of animal ration

3. Functions of Proteins Build and repair body organs and tissue
Ligaments, Hair, Hooves, Horns, Skin, Muscles
Production of milk, eggs, and wool
Fetus development

4. Conditions for Increased Protein Requirements
Young and Growing
Pregnant
Lactating (producing milk)

5. Types of Amino Acids Non-Essential Amino Acids Still needed by animals
Synthesized by the body from other A.A.’s and do not have to be provided

6. Types of Amino Acids 2. Essential Amino Acids
Cannot be made from other A.A.’s
Must be provided in the diet
Non-ruminants need most of their A.A.’s provided

7. Sources of Proteins Animal Proteins Vegetable Proteins
Meat and Bone Scraps
Blood Meal
Fish Meal
Vegetable Proteins
Soybeans
Peanut Meal
Hay
Pastures

8. Proteins Which is a better source?
Animal Proteins Source vs. Vegetable/Plant Protein Source
Which is a better source?

9. Protein Requirements
Leibig Barrel: If one amino acid is missing of deficient, it limits the performance of the animal, even if everything else is adequate or high

10. Proteins
Simple stomached animals need a balance of the essential A.A.’s
Cereal grains combined in the right amounts, can provide a balanced ration
Urea- synthetic nitrogen source that is mixed in a ration to provide nitrogen for making AA’s in the ruminants body

11. Digestible Proteins The true protein in a feed
60% of the crude protein (CP) in a roughage diet is digestible
75% of the CP in a high concentrate ration is digestible

12. Protein Review
What are proteins and what are the functions of proteins?
Explain what crude protein is.
Name two sources of proteins and an example of each.
Why do young animal require more protein that older animals?
What is the difference between essential and nonessential amino acids?
What is digestible protein?