How Do Peptides Know What to Do? A Simple Guide to Receptors and Cell Signaling
A peptide is just a chain of amino acids. So how can one peptide affect appetite while another affects growth, blood pressure, inflammation, or digestion? The peptide itself doesn’t “know” what to do. Instead, biology works through molecular recognition. Peptides interact with specific proteins called receptors. Those receptors then tell cells how to respond. This
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