1.14.17.1 acetate - 438603 1.14.17.1 acetate the enzyme is inactive inactive in absence of activating anion at pH 5.1-5.3, high catalytic activity in presence of 0.2 M acetate buffer 657814 1.14.17.1 ascorbic acid complete dependance on added ascorbate, e.g. isoascorbate, glucoascorbate, D-ascorbate 438607 1.14.17.1 cAMP non-hydrolysable cAMP analog stimulates DBH promoter activity 702956 1.14.17.1 Cl- the enzyme is inactive inactive in absence of activating anion at pH 5.1-5.3, high catalytic activity in presence of 0.05-0.6 M Cl- in 50 mM Mes buffer. 0.6 M Cl- increases the optimum concentration of ferrocyanide from 0.25 mM to 2 mM 657814 1.14.17.1 cytochrome b561 in ascorbate-loaded vesicle membranes can supply electron equivalents to support extravesicular dopamine beta-hydroxylase activity without the addition of any mediator, this activity is enhanced significantly by the addition of ferricyanide 659086 1.14.17.1 dehydroascorbate - 438603 1.14.17.1 ferricyanide in ascorbate-loaded vesicle membranes can supply electron equivalents to support extravesicular dopamine beta-hydroxylase activity without the addition of any mediator, this activity is enhanced significantly by the addition of ferricyanide 659086 1.14.17.1 fumarate - 438603, 438607, 438626 1.14.17.1 phosphate the enzyme is inactive inactive in absence of activating anion at pH 5.1-5.3, high catalytic activity in presence of 0.1 M phosphate buffer 657814