Term Name:	mRNA branch site recognition
Synonyms:	nuclear mRNA branch site recognition, spliceosomal A complex biosynthesis, spliceosomal A complex formation, spliceosomal B complex biosynthesis, spliceosomal B complex formation, U12-type nuclear mRNA branch site recognition, U2-type nuclear mRNA branch site recognition
Definition:	Recognition of the pre-mRNA branch site sequence by components of the assembling spliceosome.
Ontology:	GO: Biological Process [GO:0000348]    QuickGO    AmiGO