based on the `` '' melting ' hyperchromicities of the intact ribosomal subunits a 51-55 % fraction of the nucleotides appears to participate in hydrogen-bonded base pairing regardless of ribosome source , whereas a larger fraction , 67-70 % , appears to be involved in hydrogen bonding in the naked rrna species .
C0035553
ribosom
C0035701
rrn