Open AccessPROPERTIES OF NUCLEAR RNA IN SEA URCHIN EMBRYOS
Author(s) -
Arthur I. Aronson,
Fred H. Wilt
Publication year - 1969
Publication title -
proceedings of the national academy of sciences of the united states of america
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.011
H-Index - 771
eISSN - 1091-6490
pISSN - 0027-8424
DOI - 10.1073/pnas.62.1.186
Subject(s) - sea urchin , rna , cytoplasm , embryo , nucleus , biology , cell nucleus , polysome , microbiology and biotechnology , mesenchyme , biophysics , ribosome , biochemistry , gene
Pulse-labeled RNA in early sea urchin embryos (64 cells to mesenchyme blastulase) is found almost exclusively associated with the nucleus and turns over very rapidly. The rate of labeling of the cytoplasm is much slower and is consistent with the transfer of 6 per cent of the nuclear RNA made every 15-20 minutes. Most of the pulse-labeled nuclear RNA exists in membrane-bound polyribosomes.