Abstract

In this report we describe the isolation, by differential screening, and characterization of a cDNA clone downregulated fivefold in association with the induction of apoptosis in the human leukaemic cell line CEM C7. DNA sequence analysis identified this clone as representing the gene encoding the S20 ribosomal protein. Interestingly, the expression of the S20 mRNA was downregulated early during the induction of apoptosis in this model system, prior to the onset of DNA fragmentation and other morphological changes associated with cell death, suggesting some degree of involvement of this particular gene in the biochemical events that occur during the onset of cell death.

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