The chemical group derived from the amino acid glycine, used in building peptides and proteins.
From 'glycine' (the amino acid) + '-yl' (chemical radical suffix). The term emerged as biochemists studied how amino acids combine to form proteins.
Glycyl is the 'handle' of the simplest amino acid—glycine—and because it's so simple, it's often found in high-flexibility regions of proteins like the collagen in your skin, giving that protein its stretchy properties.
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