TY  - JOUR
A1  - Scheer, Ulrich
A1  - Lanfranchi, Gerolamo
A1  - Rose, Kathleen M.
A1  - Franke, Werner W.
A1  - Ringertz, Nils R.
T1  - Migration of rat RNA polymerase I into chick erythrocyte nuclei undergoing reactivation in chick-rat heterokaryons
N2  - Transcriptionally inactive chick erythrocyte nudei were reactivated by Sendai virusinduced fusion of erythrocytes with rat L6j1 myoblasts. We used antibodies to trace the appearance of a specific protein engaged in transcription of a defined dass of genes, those coding for rRNA, during reactivation. Using immunofluorescence microscopy, we found increasing amounts of rat RNA polymerase I to appear, during a certain period of time after fusion, in the reforming nudeoli of the chick nudei. Amounts of rat RNA polymerase I sufficient to be detected by immunofluorescence microscopy had accumulated in the newly developed chick nudeoli 72- 190 h after fusion was initiated. This time interval coincides with the time when chick rRNA synthesis can first be detected. The results raise the possibility that during these stages of the reactivation process chick rRNA genes are transcribed by heterologous RNA polymerase I moleeules of rat origin.
Y1  - 1983
UR  - https://opus.bibliothek.uni-wuerzburg.de/frontdoor/index/index/docId/3089
UR  - https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-33232
ER  -