Unknown

Dataset Information

0

High-molecular-weight nuclear polyadenylate-containing ribonucleic acid isolated from the lactating guniea-pig mammary gland contains milk-protein messenger ribonucleic acid sequences.


ABSTRACT: 1. Steady-state poly(A)-containing nuclear RNA was isolated from the lactating guinea-pig mammary gland and analysed by sucrose-gradient centrifugation under denaturing conditions. 2. Nucleic acid-hybridization studies demonstrated the presence of small amounts of high-molecular-weight RNA species containing milk-protein mRNA sequences sedimenting at 25S. These were not found in the post-nuclear supernatant, where milk-protein sequences sedimented only between 12S and 15S; these were also the predominant species in the nuclear fraction. 3. The results are consistent with the transcription of milk-protein genes as high-molecular-weight precursor RNA species, 3-4 times as large as the active mRNA species isolated from the post-nuclear fraction.

SUBMITTER: Bathurst IC 

PROVIDER: S-EPMC1161182 | biostudies-other | 1979 Aug

REPOSITORIES: biostudies-other

Similar Datasets

| S-EPMC1161215 | biostudies-other
| S-EPMC9213698 | biostudies-literature
| S-EPMC1163437 | biostudies-other
| S-EPMC7887553 | biostudies-literature
| S-EPMC1185909 | biostudies-other
| S-EPMC1166266 | biostudies-other
| S-EPMC1161609 | biostudies-other
| S-EPMC454168 | biostudies-literature
| S-EPMC1164201 | biostudies-other
| S-EPMC7094374 | biostudies-literature