Banyai, L., Patthy, L. (2004). Evidence that human genes of modular proteins have retained significantly more ancestral introns than their fly or worm orthologues.  FEBS Lett. 565(1-3): 127--132.

FBrf0179124

Research paper

Comparison of the exon-intron structures of human, fly and worm orthologues of mosaic genes assembled from class 1-1 modules by exon-shuffling has revealed that human genes retained significantly more of the original inter-module introns than their protostome orthologues. It is suggested that the much higher rate of intron loss in the worm- and insect lineages than in the chordate lineage reflects their greater tendency for genome compaction.