Group I introns are inherited through common ancestry in the nuclear-encoded rRNA of Zygnematales (Charophyceae).
Proc Natl Acad Sci U S A. 1994 Oct 11;91(21):9916-20. doi: 10.1073/pnas.91.21.9916.
Proc Natl Acad Sci U S A. 1994.
PMID: 7937917
Free PMC article.