Wada H, Satoh N.

Proc Natl Acad Sci U S A. 1994 Mar 1;91(5):1801-4 doi:10.1073/pnas.91.5.1801

Details of the evolutionary history from invertebrates to vertebrates, as deduced from the sequences of 18S rDNA.

Source for the 18S sequence D14360 (Oikopleura sp, provenance not described). Primer sequences: 5'-CTGGTTGATCCTGCCAG-3' and 5'-CACCTACGGA(AT)ACCTTG-3'