Extended Data Fig. 7: Box plot of intron sizes in axolotl, fugu, human and lungfish.
From: Giant lungfish genome elucidates the conquest of land by vertebrates
For axolotl, fugu, human and lungfish the lengths (y axis is log2-transformed scale of base pairs) of the first, second, third, fourth and fifth (and above) introns show a consistent pattern, in which the first intron is always the longest intron—both in the giant lungfish and axolotl genomes as well as in the tiny fugu (400 Mb) genome.
