Which Proteins Are Responsible for Cell Membrane Signal Transduction?

💡 The Answer

• G protein-coupled receptors (GPCRs) detect external signals and activate internal pathways.
• Receptor tyrosine kinases initiate signaling cascades by phosphorylating tyrosine residues.
• Ion channel receptors change shape in response to ligands, allowing ion flow.
• These proteins convert extracellular messages into intracellular responses.