The above figure shows the fluorescence emission spectra of three different proteins: Protein (X), Protein (Y), and Protein (Z) excited at 280 nm.
Which one of the following statements gives the correct interpretation.
1
Proteins (Y) and (Z) have tryptophan while protein (X) has only phenylalanine.
2
Protein (X) has only tyrosine and protein (Y) has tryptophan on the surface while protein (Z) has tryptophan buried inside.
3
Protein (X) has tryptophan buried inside while proteins (Y) and (Z) have tryptophan on the surface.
4
Protein (X) has only tyrosine and protein (Y) has tryptophan buried and protein (Z) has tryptophan on the surface.