• MeSH
• Cell Nucleus metabolism   ultrastructure   MeSH
• Transcription, Genetic MeSH
• Ribosomes genetics   metabolism   MeSH
• S Phase MeSH
• Binding Sites MeSH

• Publication type
• Meeting Abstract MeSH

• MeSH
• Amanitins pharmacology   MeSH
• Cell Nucleus physiology   drug effects   ultrastructure   MeSH
• Transcription, Genetic radiation effects   MeSH
• Humans MeSH
• RNA Polymerase II antagonists & inhibitors   MeSH
• RNA Polymerase III antagonists & inhibitors   MeSH
• Animals MeSH
• Check Tag
• Humans MeSH
• Animals MeSH

• MeSH
• Microscopy, Electron MeSH
• Microscopy, Fluorescence MeSH
• Intranuclear Space ultrastructure   MeSH
• Nuclear Lamina ultrastructure   MeSH
• Nuclear Matrix ultrastructure   MeSH
• Cell Nucleus Structures ultrastructure   MeSH

• MeSH
• Chromatography, Affinity methods   MeSH
• Heparin MeSH
• Nuclear Matrix MeSH
• Nuclear Proteins MeSH

• MeSH
• Chromosomes, Plant MeSH
• DNA, Plant MeSH
• Nuclear Matrix chemistry   MeSH
• Evolution, Molecular MeSH
• Polyploidy MeSH
• DNA, Ribosomal genetics   MeSH
• Tragopogon cytology   genetics   growth & development   MeSH
• Publication type
• Comparative Study MeSH

• MeSH
• Research Support as Topic MeSH
• Microscopy, Immunoelectron methods   MeSH
• Nuclear Matrix physiology   ultrastructure   MeSH
• Leukemia MeSH
• Oncogene Proteins physiology   isolation & purification   MeSH
• Avian Myeloblastosis Virus MeSH
• Animals MeSH
• Check Tag
• Animals MeSH

• MeSH
• Cells cytology   immunology   pathology   MeSH
• DNA, Neoplasm genetics   MeSH
• Research Support as Topic MeSH
• Hyperthermia, Induced methods   utilization   MeSH
• Nuclear Matrix genetics   MeSH
• Humans MeSH
• Neoplastic Processes MeSH
• Drug Delivery Systems utilization   MeSH
• Check Tag
• Humans MeSH
• Publication type
• Comparative Study MeSH

• MeSH
• Chromatin MeSH
• DNA, Neoplasm MeSH
• Nuclear Matrix MeSH
• Neoplasms chemistry   genetics   MeSH

• Conspectus
• Biochemie. Molekulární biologie. Biofyzika
• NML Fields
• biochemie
• biologie
• onkologie

In order to gain further insights into the fundamental structure of the nucleolus, nucleolar remnants of Xenopus and chickens were examined for the presence of fibrillarin and nucleolus organizer region (NOR) silver staining. Nucleolar remnants of Xenopus nucleated red blood cells were found to contain easily detectable amounts of fibrillarin and NOR silver staining. Upon examination of various tissues, fibrillarin and NOR silver staining were detected in nucleoli of Xenopus liver hepatocytes and within nucleoli of oocytes and follicle cells from ovaries of mature female toads. By comparison, nucleolar remnants of adult chicken nucleated red blood cells contained only trace amounts of fibrillarin and NOR silver staining, whereas red blood cell nucleolar remnants of immature chicks had easily detectable amounts of fibrillarin and NOR silver staining. Nucleoli from hepatocytes of both adult and immature chickens demonstrated comparable levels of fibrillarin and NOR silver staining. Since fibrillarin was found in nucleolar remnant structures, we tested for (and detected) its presence in residual nucleoli of in situ nuclear matrix derived from HeLa cells. These findings are discussed in terms of the basic structural and functional organization of the nucleolus.

• MeSH
• Cell Nucleolus * ultrastructure   MeSH
• Chromosomal Proteins, Non-Histone * analysis   MeSH
• Microscopy, Electron methods   MeSH
• Erythrocytes ultrastructure   MeSH
• Fluorescent Antibody Technique MeSH
• HeLa Cells MeSH
• Nuclear Matrix ultrastructure   MeSH
• Liver ultrastructure   MeSH
• Cells, Cultured MeSH
• Chickens MeSH
• Humans MeSH
• Oocytes ultrastructure   MeSH
• Nucleolus Organizer Region * ultrastructure   MeSH
• Ribonucleoproteins analysis   MeSH
• Xenopus laevis MeSH
• Animals MeSH
• Check Tag
• Humans MeSH
• Female MeSH
• Animals MeSH
• Publication type
• Research Support, U.S. Gov't, P.H.S. MeSH
• Comparative Study MeSH