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Topics > Biochemistry > Genetics

	Project title	How widespread is the occurrence of spliceosomal introns in the nuclear-encoded rDNA of lichen-forming and free-living members of the Ascomycota
	Difficulty Level	High school
	Main link	Click here to view this science project
Description
Spliceosomal (pre-mRNA) introns have previously been found in eukaryotic protein-coding genes, in the small nuclear RNAs of some fungi, and in the small- and large-subunit ribosomal DNA genes of a limited number of ascomycetes. How the majority of these introns originate remains an open question because few proven cases of recent and pervasive intron origin have been documented.
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