Some intercellular proteins are needed to respond to specific extracellular signals. This section will cover how such proteins can be stored, recycled and kept available during the periods of time in between the arrival of such extracellular signals.

FIRST LOOK		ADVANCED LOOK		FLASH
An overview of the key stages involved in Protein Recycling.		An in-depth look at the key stages involved in Protein Recycling.		An embedded Flash movie version of the Protein Recycling animation.