purification of casein messenger ribonucleic acids ( mrnas ) from lactating rat mammary gland rna has been accomplished by a combination of sizing techniques , including sepharose 4b chromatography and preparative agarose-urea gel electrophoresis , and affinity chromatography of poly ( adenylic acid ) -containing mrna on oligo ( dt ) -cellulose .
C0035696
messenger ribonucleic acids
C0035668
rna