To test the validity of intron-exon structure as a phylogenetic marker, the intron-exon structure of EF-1 alpha genes was investigated for starfish, acornworms. ascidians. larvaceans, and amphioxus and compared with that of vertebrates. Of the 11 distinct intron insertion sites found within the...
One upstream element may be involved in the activation of expression in meristematic tissues; the downstream region, corresponding to an intron within the 5 non-coding region (5IVS), is important for expression in roots; both upstream and downstream sequences are required for expression in leaves...