These receptors typically bind to molecules that can pass through the plasma membrane, such as gases like nitrous oxide and steroid hormones like estrogen ... pathways, also called signal ...

Mapping the key signaling molecules in biochemical pathways will be central to future drug discovery efforts. Signal transduction describes the process of conversion of external signals ...

Attisano, J.L. Wrana, "MADR1, a MAD-related protein that functions in BMP2 signaling pathways," Cell, 85:489-500 ... is one thing that is known about the mechanisms that govern signal transduction, it ...