Secretory proteins include many hormones, enzymes, toxins, and antimicrobial peptides.

A "complete" protein includes all nine essential amino acids.

These proteins include elastin, which gives elasticity, which may be altered in some people.

Human proteins which are members of the coronin family include:

Other important proteins include the glycoproteins, the lipoproteins and to a lesser degree the globulins.

The proteins involved are named for their molecular weight (in kilo Daltons), and include the following:

This bacterial protein, commonly found in salt marshes, included a segment known as a chromophore, which changed its properties when exposed to light.

In 1948 Pauling discovered that many proteins included helical (see alpha helix) shapes.

Other proteins belonging to this family include the major pollen allergens:

Such proteins include components of holoenzyme and perhaps other factors [see ref.