22.4 The spliceosome contains snrnas 5AGGOAUG U2 pairs with the branch site Figure 22.13 U2 Splicing utilizes U GAU -5 a series of base U6 pairs with the 5 splice site 3GAGACA5 pairing reactions 5AGGUA between U5 crosslinks to both exons SnRNAs and U5 splice sites 请莘大Figure 22.13 Splicing utilizes a series of base pairing reactions between snRNAs and splice sites. 22.4 The spliceosome contains snRNAs