has_part exists_during inheres_in towards altered level of substance in cell during vegetative growth increased phosphatidylserine externalization A cell phenotype in which the amount of phosphatidylserine measured in the outer leaflet of the plasma membrane is higher than normal when the cell is in the vegetative growth phase of the life cycle. Normally, phosphatidylserine is restricted to the inner leaflet of the plasma membrane. midori increased phosphatidylserine level in external side of cell membrane during vegetative growth 2016-12-05T15:02:42Z FYPO:0005823 increased phosphatidylserine externalization during vegetative growth The appearance of phosphatidylserine on the external side of the plasma membrane is a marker for apoptosis. increased phosphatidylserine externalisation increased phosphatidylserine level in outer leaflet of plasma membrane increased phosphatidylserine externalization during mitotic cell cycle increased PS externalization