mitotic G1/S phase transition delay mitotic G1/S phase transition delay following nitrogen starvation-induced G1 phase arrest midori delayed mitotic G1 phase progression following nitrogen starvation-induced G1 phase arrest delayed cell cycle progression through mitotic G1/S phase transition following cell cycle arrest in mitotic G1 phase in response to nitrogen starvation mitotic cell cycle delay at G1/S transition following nitrogen starvation-induced G1 phase arrest 2014-06-16T11:54:10Z FYPO:0003438 mitotic G1/S phase transition delay after recovery from nitrogen starvation-induced G1 arrest A cell cycle phenotype in which the G1/S transition of the mitotic cell cycle begins later than normal after the cell has been arrested in G1 phase due to nitrogen starvation. The duration of G1 arrest is thus longer than normal. increased duration of nitrogen starvation-induced mitotic G1 phase arrest mitotic G1/S transition delay following nitrogen starvation-induced G1 phase arrest A G1/S delay may indicate that a checkpoint, such as the cell size checkpoint or the G1/S DNA damage checkpoint, is activated. Checkpoint activation can be tested using checkpoint kinase mutants.