title: The small nuclear ribonucleoproteins that react with anti-Sm and anti-RNP antibodies.
abstract: We have examined the polypeptide pattern of small nuclear ribonucleoprotein particles that react with monoclonal anti-Sm antibodies or polyclonal anti-(U1)RNP antibodies. The fresh nuclear extracts analyzed were prepared from human cells that had been pulse-chased with a mixture of 15 3H-labeled amino acids. In contrast to previous reports in the literature, the apparent molecular weights of the major polypeptides that remained in the 1 M NaCl-washed ribonucleoprotein-antibody complexes were approximately 80000, 55000, 28000, 25000, 14000 and 9000, when probed with monoclonal anti-Sm antibodies, and about 69000, 58000 and 35000, when polyclonal anti-(U1)RNP antibodies were used.
mesh_terms: D000906:Antibodies; D000911:Antibodies, Monoclonal; D000936:Antigen-Antibody Complex; D004591:Electrophoresis, Polyacrylamide Gel; D000939:Epitopes / Q000032:analysis; D006801:Humans; D008970:Molecular Weight; D012313:RNA / Q000032:analysis / Q000276:immunology; D012342:RNA, Small Nuclear; D012261:Ribonucleoproteins / Q000032:analysis* / Q000276:immunology; D017411:Ribonucleoproteins, Small Nuclear
chemical_list: D000906:Antibodies; D000911:Antibodies, Monoclonal; D000936:Antigen-Antibody Complex; D000939:Epitopes; D012342:RNA, Small Nuclear; D012261:Ribonucleoproteins; D017411:Ribonucleoproteins, Small Nuclear; D012313:RNA