Synthesis of ribosomal RNA in synkaryons and heterokaryons formed between human and rodent cells - PubMed (original) (raw)
Synthesis of ribosomal RNA in synkaryons and heterokaryons formed between human and rodent cells
C J Marshall. J Cell Sci. 1975 Mar.
Abstract
A study has been made of the ribosomal RNA and chromosome constitution of man-mouse hybrid cells. Previous work has shown that no human 28s rRNA is detectable in man-mouse synkaryons. In general human chromosomes are lost from such hybrids. With a recently developed method for distinguishing mouse from human chromosomes, an analysis of various man-mouse hybrid cell lines has been made. This indicates that not all the human chromosomes bearing nucleolar organizers are lost in the hybrid cells and such loss cannot alone explain the absence of human 28s rRNA. An examination of the 28s rRNA synthesized by heterokaryons formed from several different parent cells has revealed that both parental types of 28s rRNA are present in heterokaryons. The control of rRNA synthesis in hybrid cells is discussed.
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