Characterization of the poly(adenylic acid) regions and the adjacent nucleotides in heterogeneous nuclear ribonucleic acid and messenger ribonucleic acid from HeLa cells.

Adenosine Monophosphate/analysis,isolation & purification Base Sequence Chromatography, Affinity Electrophoresis, Polyacrylamide Gel HeLa Cells/analysis Humans Oligonucleotides/isolation & purification Phosphorus Isotopes Poly U Polynucleotides/analysis Polysaccharides RNA/analysis,isolation & purification RNA, Messenger/analysis,isolation & purification Tritium

Oligonucleotides Phosphorus Isotopes Polynucleotides Polysaccharides RNA, Messenger Tritium Poly U Adenosine Monophosphate RNA