Antiserum against 3-O-methyldopamine (MD) was produced in rabbits immunized with MD
hapten conjugated to hemocyanin. The antiserum was used to develop a …

MATERIALS AND METHODS Except for S-adenosylmethionine, DL-dithiothre itol, and tris
(hydroxymethyl) aminomethane, all chemicals were obtained commercially from the same …

A technique for the selective extraction of 3-O-methyldopamine, normetanephrine and
metanephrine from a single urine sample has been investigated. After hydrolysis of the …

We modified the single-isotope radioenzymatic assay for catecholamines [Life Sci. 21, 625
(1977)] to assay 3, 4-dihydroxyphenylalanine (DOPA). DOPA decarboxylase is used to …

Urinary 3-O methyldopamine has been found highly increased in all cases of malignant
tumours, as well of sympathetic nature (sympathoblastoma) as of chromaffin type …

In a recent report (1) we described a chromatographic method for deter-mining free
methyldopa in human urine. The drug was absorbed onto alumina, eluted, and the eluate …

A double-isotope, radioenzymatic assayfor measuring dopamine, norepinephrine, and epi-
nephrine in one sample is described. The assayprocedure includes incubation, solvent …

This enzyme-radioimmunoassay for the measurement of L-dopa, dopamine, and 3-O-
methyldopamine is based on the incubation of urine in the presence of catechol-O …

A sensitive simple radiometric method for the simultaneous measurement of norepinephrine,
epinephrine, and dopamine is described. Fifty microliters of plasma or tissue extract was …

A rapid, simple, and reliable method for the simultaneous estimation of D and O-MD in
plasma and brain is described. These compounds are eluted together, but separately from …