The molecule - epidermal growth factor receptor (EGFR) - relays instructions to cells to grow and divide, and to ignore signals telling them to die.

BBC: NEWS | Health | Smart drug for lung cancer tested

All three drugs target the epidermal growth factor receptor (EGFR), a protein that is over-expressed in cancer cells.

FORBES: Magazine Article

The public has mostly focused on Erbitux's ability to slow tumor growth by blocking epidermal growth factor receptor, a key growth-promoting protein that is overabundant in many cancer cells.

FORBES: Bristol, ImClone File On Erbitux