22.4 The spliceosome contains snrnas Figure 22 14 pliceosomes are ellipsoidal particles with several discrete regions. The bar is 50 nm. Photograph kindly provided by Tom maniatis 消当Figure 22.14 Spliceosomes are ellipsoidal particles with several discrete regions. The bar is 50 nm. Photograph kindly provided by Tom Maniatis. 22.4 The spliceosome contains snRNAs