title: The metabolic behaviour of nuclear and cytoplasmic non-polyadenylated RNAs with an affinity for poly(adenylic acid) from Friend murine leukaemia cells.
abstract: Using poly(A)-Sepharose and poly(U)-Sepharose affinity chromatography, various classes of nuclear RNA can be distinguished in Friend leukaemia cells. One of these contains a poly(A) tract (poly(A)+-RNA) and another lacks a poly(A) tract but has an affinity for poly(A)-Sepharose (poly(A)-u+-RNA). The stability of these two particular nuclear RNA classes was examined by using a 'pulse-chase' technique involving D-glucosamine treatment. Nuclear poly(A)-u+-RNA was found to decay as a single component with a half-life of about 12 min. In contrast, nuclear poly(A)+-RNA appears to consist of at least two distinct metabolic components with half-lives of about 22 min and 120 min. Furthermore, poly(A)-u+-RNA is transported from the nuclei much more rapidly than the poly(A)+-RNA. The 'pulse-chase' approach also allowed a quantitative estimate to be made of the conversion of nuclear poly(A)+-RNA and poly(A)-u+-RNA to cytoplasmic poly(A)-RNA and poly(A)-u+-RNA.
mesh_terms: D000818:Animals; D002467:Cell Nucleus / Q000378:metabolism; D002846:Chromatography, Affinity; D003593:Cytoplasm / Q000378:metabolism; D004355:Drug Stability; D005622:Friend murine leukemia virus; D007942:Leukemia, Experimental / Q000032:analysis / Q000378:metabolism*; D051379:Mice; D011061:Poly A / Q000378:metabolism*; D012313:RNA / Q000378:metabolism; D012333:RNA, Messenger; D012334:RNA, Neoplasm / Q000302:isolation & purification / Q000378:metabolism*
chemical_list: D012333:RNA, Messenger; D012334:RNA, Neoplasm; D011061:Poly A; D012313:RNA