Activity of platelet monoamine oxidase in apparently health subjects.

Abstract:

:Monoamine oxidase activity was assayed in platelets from 32 apparently healthy subjects using phenethylamine as substrate and two concentrations of oxygen (0.06 and 0.12 mM). Apparent Km (microM) and Vmax (nmol/mg protein/5 min) values were estimated from double reciprocal plots. The means of the Km and Vmax values were both increased by a factor of about 1.6 when the oxygen concentration was elevated from 0.06 mM (Km = 2.96 and Vmax = 4.47) to 0.12 mM (Km = 4.82 and Vmax = 7.18). The frequency distribution of the Vmax values was not clearly unimodal, especially at the higher oxygen concentration. The Vmax values of the women were significantly higher than those of the men but no sex difference was obtained for the Km values. The overall velocity (v) at 10 microM phenethylamine was highly correlated to the Vmax values both at low and high oxygen concentrations (r = 0.99 and 0.98, respectively).

journal_name

Clin Genet

journal_title

Clinical genetics

authors

Koide Y,Sääf J,Roos SB,Wahlund LO,Wetterberg L

doi

10.1111/j.1399-0004.1981.tb00734.x

subject

Has Abstract

pub_date

1981-05-01 00:00:00

pages

400-5

issue

5

eissn

0009-9163

issn

1399-0004

journal_volume

19

pub_type

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