obsolete extrachromosomal circular DNA accumulation involved in cell aging https://github.com/geneontology/go-ontology/issues/22061 true OBSOLETE. Increase in abundance, as cells age, of circular DNA molecules that originate in the chromosome but are excised and circularized, often by intramolecular homologous recombination between direct tandem repeats, and replicated independently of chromosomal replication. extrachromosomal circular DNA accumulation during cell ageing This term was obsoleted because it represents a phenotype. GO:0007580 biological_process extrachromosomal circular DNA accumulation during cell aging maintenance of rDNA