GO:0071013; C:catalytic step 2 spliceosome; IDA:FlyBase.
GO:0071011; C:precatalytic spliceosome; IDA:FlyBase.
GO:0003729; F:mRNA binding; ISS:FlyBase.
GO:0000166; F:nucleotide binding; IEA:InterPro.
GO:0008270; F:zinc ion binding; IEA:InterPro.
GO:0000398; P:mRNA splicing, via spliceosome; IC:FlyBase.
GO:0000381; P:regulation of alternative mRNA splicing, via spliceosome; IMP:FlyBase.