output_of catalytic activity phenotype constitutive catalytic activity FYPO:0000683 constitutive enzymatic activity 2011-12-01T01:51:53Z constitutive catalytic activity during mitotic cell cycle constitutive catalytic activity during vegetative growth constitutively active enzyme midori A regulation phenotype in which the basal activity of an enzyme is increased relative to normal. Basal enzyme activity is the activity observed in the absence of a regulator. Abnormally elevated basal activity may or may not reach the levels observed in the normal activated state. abnormal regulation of catalytic activity