Spliceosomal A complex
spliceosomal a complex
The spliceosomal A complex is an intermediate complex in the assembly of a spliceosome.   The entry of the U2 snRNP to the <a href='https://www.genenames.org/data/genegroup/#!/group/1522'>E complex</a> defines the branch-point and leads to the formation of the A complex. The A complex associates with the <a href='https://www.genenames.org/data/genegroup/#!/group/1506'>U4/U6.U5 tri-snRNP</a> to generate the <a href='https://www.genenames.org/data/genegroup/#!/group/1507'>B complex</a>.