Through a study done at the University of Albany, it was shown that the ability of the Coomassie dye to target amino acids with aromatic groups (phenylalanine, tyrosine, tryptophan) and basic side chains (lysine, arginine and histidine), allows Bradford assay to be used for fingerprint analysis. Bradford assay was successfully used to identify the biological sex of the fingerprint. Female samples were shown to have a higher absorbance compared to male samples when tested at similar wavelengths.