. "Any process that stops, prevents, or reduces the frequency, rate or extent of CDK activity contributing to the G1/S transition of the cell cycle." . . . "negative regulation of cyclin-dependent protein kinase activity involved in G1/S" . "G1/S-specific down regulation of cyclin-dependent protein kinase activity" . "G1/S-specific down-regulation of cyclin-dependent protein kinase activity" . "G1/S-specific downregulation of cyclin-dependent protein kinase activity" . "G1/S-specific inhibition of cyclin-dependent protein kinase activity" . "G1/S-specific negative regulation of cyclin-dependent protein kinase activity" . "negative regulation of cyclin-dependent protein kinase activity during G1/S" . . .