title: Hydrophobic affinity chromatography of nucleic acids and proteins.
abstract: 5' tritylated oligonucleotides binding hydrophobically to low trityl cellulose/sepharose (< 15 microMTr/ml) retain their hydrogen-bonding specificities for complementary sequences. This, constitutes a novel mode of attaching affinity ligands to solid supports, is more convenient than existing methods, and proceeds with 100% yield. The salt, dielectric constant and temperature dependence of these non-covalently anchored ligands permits the isolation of a variety of RNAs including fibroin mRNA. Medium trityl sepharose (15-40 microM Tr/ml) has a high binding specificity for poly A and poly A containing mRNA, equivalent to dT cellulose. Most proteins, including nucleic acid enzymes, bind to these columns and retain enzymatic activity, thus mimicking enzymes attached covalently to solid phases. A number of in vivo counterparts to this hydrophobically determined specificity are noted, as are homologies to nitro-cellulose filters.
mesh_terms: D000345:Affinity Labels / Q000138:chemical synthesis*; D002482:Cellulose; D002846:Chromatography, Affinity / Q000379:methods*; D004798:Enzymes; D009691:Nucleic Acid Denaturation; D009696:Nucleic Acids; D011061:Poly A; D011131:Polyribonucleotides; D011506:Proteins; D012117:Resins, Synthetic; D012685:Sepharose; D014320:Triphenylmethyl Compounds
chemical_list: D000345:Affinity Labels; D004798:Enzymes; D009696:Nucleic Acids; D011131:Polyribonucleotides; D011506:Proteins; D012117:Resins, Synthetic; D014320:Triphenylmethyl Compounds; D011061:Poly A; D002482:Cellulose; D012685:Sepharose