Ultraviolet spectroscopy is often used to monitor the amount of a protein in a sample. T...

Ultraviolet spectroscopy is often used to monitor the amount of a protein in a sample. The amount of protein is correlated with the absorbance at 280 nm. Explain which of the following amino acids you expect to have an absorption at 280 nm. (The carbonyl groups of the peptide [amide] bonds of the protein do not absorb at this wavelength.)