The characteristic strong absorbance of 280nm of proteins is due to

Q. The characteristic strong absorbance of 280nm of proteins is due to

1. All amino acids can absorb at 280nm
2. Only Tryptophan and tyrosine can absorb at 280 nm
3. Tryptophan is responsible for the absorbance
4. Tryptophan, tyrosine and phenylalanine can absorb at 280 nm

Answer: Tryptophan, tyrosine and phenylalanine can absorb at 280 nm