This term is obsolete.
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Definition:
OBSOLETE. The initial formation of a stable single-strand DNA lesion that triggers programmed gene conversion at the mating-type locus, thereby restricting mating-type interconversion to one of the two sister chromatids during DNA replication.
Comment:
This term was obsoleted because it represents a molecular function.
Synonyms:
exact_synonym:
mating type determination, establishment of imprinting