Smith, C.W.J. (2005). Alternative splicing - When two's a crowd.  Cell 123(1): 1--3.

FBrf0189925

Note

Various mechanisms have been proposed to explain mutually exclusive splicing of pairs of exons. A paper in this issue of Cell (Graveley, 2005) provides a fascinating insight into the perplexing question of how only one exon at a time is chosen from an array of 48 exons in the Drosophila Dscam gene.