abnormal cell cycle arrest in mitotic G1 phase abolished cell cycle arrest in mitotic G1 phase in response to phosphate starvation 2023-03-06T13:08:24Z A cellular process phenotype in which progression through the mitotic cell cycle is no longer arrested during G1 phase when phosphate is removed. Arrest may either occur under conditions where arrest is not a normal occurrence, or may progress differently from normal under conditions where arrest normally does take place. vw253