AmTrac

Frommer and his team developed a simple method for monitoring uptake of ammonium into live cells. This involved the creation of AmTrac, shown here as a three-dimensional model, an ammonium transporter coupled to a fluorescent protein , which allows the researchers to monitor the activity of the transport protein as it works to move ammonium into the cell. The model image is courtesy of Susana Andrade, U. Freiburg, Germany.

AmTrac