The importance of proteins for the body

The importance of proteins for the human body is enormous. At the same time, they represent the body's only source of nitrogen.

Functions:
 * structural - collagen, elastin;
 * motor - actin, myosin;
 * informational - protein hormones;
 * defensive - immunoglobulins, complement, antigens;
 * transport - albumin, enable catalysis (enzymes) and others.