Types of plasma protein

Most, but not all, plasma proteins are manufactured in the liver including albumins. These are the most abundant and form about 60% of all plasma proteins. They contribute to osmotic pressure, help to control water balance and are involved in the transport of substances in blood including drugs.

Globulins (globular proteins) form 35% of the whole and include antibodies, whilst others have transport functions.

Approximately 4% of plasma proteins, such as fibrinogen, have a clotting function whilst the remaining less than 1% are regulatory, such as metabolic enzymes.