Is predicted to encode a protein with the following domains: Cyclin, C-terminal domain; Cyclin; Cyclin-like superfamily; Cyclin, N-terminal; Cyclin, N-terminal domain; and Cyclin-like. Is an ortholog of C. elegans cyb-1; cyb-2.1; and cyb-2.2. In C. elegans, cyb-1 is involved in mitotic cell cycle; oocyte maturation; and positive regulation of protein phosphorylation.