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Mating-type region
The
mating-type region
is a specialized region in the
genomes
of some
yeast
and other
fungi
, usually organized into
heterochromatin
and possessing unique
histone methylation
patterns. The
genes
in this region regulate the
mating type
of the organism and therefore determine key events in its
life cycle
, such as whether it will reproduce
sexually
or
asexually
. In
fission yeast
such as
S. pombe
, the formation and maintenance of the heterochromatin organization is regulated by
RNA-induced transcriptional silencing
, a form of
RNA interference
responsible for genomic maintenance in many organisms. Mating type regions have also been well studied in
budding yeast
S. cerevisiae
and in the fungus
Neurospora crassa
.
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