“ Tetracycline addition caused an increase in nucleic acid bands (…, 1478, 1578cm-1), a sharp decrease in phenylalanine (995cm-1) in Raman spectra and the amide I and amide II bands (1630, 1530cm-1) … IR spectra, an increase in DNA in both Raman (1083cm-1) and IR spectra (1080cm-1).”