Learning Outcomes
| Table 1. Protein Types and Functions |
|---|
| Type | Examples |
|---|
| Transport | Hemoglobin, albumin |
| Structural | Actin, tubulin, keratin |
| Hormones | Insulin, thyroxine |
An amino acid is an organic molecule that is made up of a basic amino group (−NH2), an acidic carboxyl group (−COOH), and an organic R group (or side chain) that is unique to each amino acid.
There are four stages of protein folding, primary, secondary, tertiary and quarternary.
Protein has many roles in your body. It helps repair and build your body's tissues, allows metabolic reactions to take place and coordinates bodily functions. In addition to providing your body with a structural framework, proteins also maintain proper pH and fluid balance.
The different levels of protein structure are known as primary, secondary, tertiary, and quaternary structure.
What are proteins and what do they do?
| Function | Description | Example |
|---|
| Structural component | These proteins provide structure and support for cells. On a larger scale, they also allow the body to move. | Actin |
| Transport/storage | These proteins bind and carry atoms and small molecules within cells and throughout the body. | Ferritin |
Casein, the chief protein in milk and the essential ingredient of cheese. In pure form, it is an amorphous white solid, tasteless and odourless, while its commercial type is yellowish with a pleasing odour. Cow's milk contains about 3 percent casein.
Protein makes up the building blocks of organs, muscles, skin, and hormones. Your body needs protein to maintain and repair tissues. Meanwhile, children need it for growth. Studies show that eating protein can also help you lose weight and belly fat while increasing your muscle mass and strength ( 1 , 2 ).
??Proteins are organic molecules composed of Carbon, Hydrogen, Oxygen and Nitrogen. Proteins are crated by linking together amino acids into protein links called polypeptide chains. The arrangement of the C,H and O in this group determines the name of the amino acid.
In humans, up to ten different proteins can be traced to a single gene. Proteome: It is now estimated that the human body contains between 80,000 and 400,000 proteins. However, they aren't all produced by all the body's cells at any given time.
Protein can be categorized into two types: complete and incomplete proteins. Proteins are made up of smaller units, called amino acids. Complete proteins contain all of the amino acids your body needs and include meat, fish, poultry, dairy, and soy products.
Protein is the basic component of living cells and is made of carbon, hydrogen, oxygen, nitrogen and one or more chains of amino acids. The three types of proteins are fibrous, globular, and membrane.
According to the Dietary Reference Intake report for macronutrients, a sedentary adult should consume 0.8 grams of protein per kilogram of body weight, or 0.36 grams per pound. That means that the average sedentary man should eat about 56 grams of protein per day, and the average woman should eat about 46 grams.
