A protein complex that binds to the Swi4/6 cell cycle box (SCB) promoter element, consensus sequence CRCGAAA, and activates transcription during the G1/S transition of the cell cycle. In Saccharomyces, the complex contains a heterodimer of the DNA binding protein Swi4p and the activator Swi6p, and is associated with additional proteins known as Whi5p and Msa1p.
Source:PMID:11206552,
PMID:15838511,
PMID:7917338,
PMID:18160399,
PMID:19150335,
GOC:mah