obsolete regulation of interphase of mitotic cell cycle true biological_process regulation of interphase of mitotic cell cycle pr This term was made obsolete as part of the cell cycle overhaul. This is because it was decided that cell cycle phases are intervals and so cannot be regulated, rather it is the transitions between the phases that are regulated. GO:2000602 2011-04-15T03:52:25Z OBSOLETE. Any process that modulates the frequency, rate or extent of interphase of mitotic cell cycle.