One example is follicle-stimulating hormone, which travels from the ... of molecular switches to internal signaling pathways. Membrane receptors fall into three major classes: G-protein-coupled ...

Bacteria naturally present in the human intestine (known as the gut microbiota) can transform cholesterol-derived bile acids ...

Signaling is initiated by the binding of Wnt to a Frizzled receptor as well as a low ... of the mechanistic link between the estrogen endocrine pathway and the RANK/RANKL/OPG signaling pathway.