Species-specific Non-expression of Ribosomal RNA Genes in a Mammalian Hybrid, the Mule

Overview

Journal Chromosoma

Specialty Molecular Biology

Date 1986 Jan 1

PMID 3829827

Citations 5

Authors

E Kopp

B Mayr

W Schleger

Affiliations

Soon will be listed here.

Abstract

The expression of nucleolus organizer activity in diploid cells was investigated in a model system for mammalian hybrids, the horse-ass cross (mule), by means of sequential Ag-NOR and chromomycin A3/distamycin A-DAPI (CDD) staining in lectin-stimulated peripheral blood lymphocytes (PBL). As a rule we found species-specific non-expression of the horse-derived NOR chromosomes in the mule, whereas the ass-derived NOR chromosomes were active. The results of PBL interphase studies were compatible with the data gained from mitotic metaphase analyses.

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