(color online) and of DNA in various solvent conditions measured by MT. (a) of DNA in different concentrations of spermine and spermine in 15% ethanol and 0.5-M ZS. (b) of DNA at the same condition as panel (a). (c) and in spermidine (1 mM) and different concentrations of ethanol. (d) and in spermine (1 mM) and different concentrations of 6-A.