The spliceosomal catalytic core arose in the RNA world… or did it?

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The spliceosomal catalytic core arose in the RNA world… or did it?

Genome Biol. 2013 Dec 13;14(12):141

Authors: Doolittle WF

Abstract
A new study adds to the evidence for a common evolutionary origin of the spliceosome and group II introns, but RNA-world questions remain.

PMID: 24330866 [PubMed - as supplied by publisher]