using escherichia coli ribosomal rna as internal standards , the molecular weights of mitochondrial ribosomal rnas were found to be 0.74 to 0.75 and 1.26 x 10 ( 6 ) daltons by polyacrylamide gel electrophoresis , before or after denaturation in formaldehyde .
C0035701
ribosomal rna
C0035553
ribosomal