Thionins (without an e) are a family of small proteins found solely in higher plants.

However, even the smallest proteins have over 1000 atoms, which makes determining their structure far more complex.

These small proteins cause the blood vessels to become inflamed.

A small injected protein is not enough to touch off this response.

Knottins are small, diverse and stable proteins with important drug design potential.

Many of these small proteins act on the limbic system and are concerned with our emotional states.

Increases endorphin levels - small proteins that act as a natural pain killer for the body.

Cytokines are small proteins that can influence the behavior of white blood cells.

The process is named after a small protein known as ubiquitin.

These small proteins are also known for their compact and closely packed three-dimensional structures.