absorption-temperature profile and absorption-ph profile of poly [ r ( a-s-2u ) ] did not reveal a structural transition between 10 and 95 degrees c even at low ionic strength , although a variety of properties indicated a helical structure of poly [ r ( a-s-2u ) ] : remarkable hyperchromicity of the absorption spectrum , circular dichroic spectrum displaying extrema of large amplitudes , resistance against hydrolysis by ribonuclease and interaction with ethidium bromide in a manner which is characteristic of helical polynucleotides .
C0020291
hydrolysis
C0035542
ribonuclease