A ribonucleoprotein that binds to specific sites in, and is required for cleavage of, the 3'-end of histone pre-mRNAs. The complex contains the U7 snRNP and additional proteins, including the stem-loop binding protein (SLBP) and the exonuclease 3'hExo/Eri-1. [GOC:mah, PMID:19470752]
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C5: Ontology GO: Gene Ontology GO:CC: GO Cellular Component