abnormal mitotic cell cycle regulation upon nitrogen source shift attenuated change in cell size at division upon shift to poor nitrogen source 2020-07-23T15:35:42Z attenuated change in cell size at division upon shift to poor nitrogen source during mitotic cell cycle decreased change in cell length at division after shift to poor nitrogen source attenuated change in cell size at division upon shift to poor nitrogen source during vegetative growth A cell phenotype observed in the vegetative growth phase of the life cycle in which cells do not change the length at which they divide to the same extent as normal upon shifting from a good nitrogen source to a poor nitrogen source. Normally, cells divide at a smaller size after shifting to a poor nitrogen source; in mutants the size difference is less pronounced between media with good versus poor nitrogen sources. Good (or rich) nitrogen sources are distinguished from poor sources based on how readily nitrogen is assimilated into cellular metabolism. In microorganisms, good nitrogen sources generally support higher cell population growth rates than poor sources. In fission yeast, cells divide at a smaller size when grown on a poor nitrogen source than in nitrogen-rich media; proline is commonly used as a poor nitrogen source. midori FYPO:0007434