Their study, published recently in Nature, focuses on what is known as the estrogen receptor, a protein linked in previous research to the development of roughly 70% of all breast tumors.

The 'fight or flight' hormone adrenaline — which is produced during times of stress — is an agonist of the β 2-adrenergic receptor (β 2 AR), a G-protein-coupled receptor (GPCR) that mediates ...