title: DNA condensation with polyamines I. Spectroscopic studies.
mesh_terms: D055598:Chemical Phenomena; D002621:Chemistry; D002942:Circular Dichroism; D003090:Coliphages; D004279:DNA, Viral; D009994:Osmolar Concentration; D011073:Polyamines; D013057:Spectrum Analysis; D013095:Spermidine
chemical_list: D004279:DNA, Viral; D011073:Polyamines; D013095:Spermidine