Large intron statistics and genome information by species.

Note. For columns left to right: number of non-redundant large introns (>50 kb) in different animal genomes; genome size of each species; number of introns per gene; sequence quality of all large introns in the species (>50 kb) as measured by percentage of ambiguous nucleotides (number of N's); sequence quality in the random set of large intron fragments used to predict stems.