nuclear cap binding complex https://github.com/geneontology/go-ontology/issues/12853 NCBP-NIP1 complex CBC A conserved heterodimeric protein complex that binds to the 5' terminal cap structure m7G(5')ppp(5')N of nascent eukaryotic RNA polymerase II transcripts such as pre-mRNA and U snRNA. The consists of proteins known as CBP20 and CBP80, binds to cap structures in the nucleus, and is involved in pre-mRNA splicing, 3'-end formation, and RNA nuclear export. nuclear CBC Note that this complex can be found in the cytoplasm as well as the nucleus. GO:0005846 mRNA cap binding complex cellular_component snRNA cap binding complex RNA cap binding complex