One of the simplest compartments is a protein shell, like the capsid of a virus.

They are made of a protein shell which surrounds and encloses various enzymes.

The ultrasound contrast is made up of tiny microbubbles filled with a gas core and protein shell.

Then it began to tunnel through the heavily protected protein shell.

When attacked, it encapsulates within a protein shell and remains there until the immune system runs down again.

The outer protein shells of many viruses form regular polyhedra.

The virus has a double protein shell.

Carboxysomes are made of polyhedral protein shells about 80 to 140 nanometres in diameter.

Adult E. soleae lays tetrahedral eggs that have a tanned protein shell.

A capsid is the protein shell of a virus.