Which of the following amino acids is most likely to be found in β-turns of proteins?
Glycine is the correct answer as it accurately identifies the biological location, composition, or distribution described in this question. In Amino_Acids_Structure, the spatial organization and localization of molecules are critical to their function. Glycine is specifically associated with the structure or compartment mentioned because of its unique biochemical properties and physiological role. The other options (Alanine, Methionine, and Phenylalanine) are primarily associated with different cellular compartments, tissues, or structural contexts.
Ref: Campbell Biology, Urry et al., 12th Ed.