Article
Basal divergences in birds and the phylogenetic utility of the nuclear RAG-1 gene.
Molecular phylogenetics and evolution - 1 Jul 1999
Groth J G, Barrowclough G F
Abstract excerpt
The single-copy RAG-1 gene is found throughout higher vertebrates and consists of a single 3.1-kb exon without intervening introns. A 2.9-kb region of the RAG-1 locus was sequenced for 14 basal taxa of birds plus the crocodylian outgroups Alligator and Gavialis. Phylogenetic analysis of the sequences supported the hypothesis that the deepest evolutionary split in extant birds separates paleognaths from neognaths....
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