Question

When proteins absorb light in the 250 nm to 320 nm range, most of this absorbance is caused by three aromatic amino acids: phenylalanine, tyrosine, and tryptophan. Handdraw and label the chemical structures of these three amino acids. Only one of the above mentioned amino acids responds to added NaOH at the concentration we used. Which one? Hand-draw the chemical reaction that accounts for the spectral change of this amino acid in the 250 nm to 320 nm region upon addition of NaOH. 2 points

Answer 1