A protein complex that functions as a guanine nucleotide exchange factor (GEF) and converts Rab-GDP to Rab-GTP. In S. cerevisiae, this complex consists of at least Mon1 and Ccz1, and serves as a GEF for the Rab Ypt7p. [GOC:rb, PMID:20797862]
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Collection
C5: Ontology GO: Gene Ontology GO:CC: GO Cellular Component