combining conductivity measurements and molecular weight determination by means of low-angle laser light scattering , we have found for the polyribonucleotides ( polyuridylic acid ( poly ( u ] , polyadenylic acid ( poly ( a ] , polycytidylic acid ( poly ( c ] and polyguanylic acid ( poly ( g ] and for single-stranded dna ( ssdna ) that , on average , 8.5 counterions per single-strand break ( ssb ) are liberated under salt-free conditions .
C0032590
polyribonucleotides
C0032411
polyguanylic acid