Alternative splicing plays a major role in the generation of functional diversity but the underlying mechanisms remain poorly understood. In a comparative genome analysis of 73 arthropod species, spanning around 420 million years of evolution, Yongfeng and coworkers find built-in intronic elements that lead to mutual exclusive splicing. These elements are species- or clade-specific, but evolutionarily conserved at the secondary structure level.
- Yun Yang
- Leilei Zhan
- Yongfeng Jin