Activity of Trimethylamine-N-Oxide Demethylase (TMAOase) in the Forming of Natural Formaldehyde in Lizardfish (Saurida tumbil)

Azizah Nuraini, Tati Nurhayati, Mala Nurilmala


Formaldehyde in the fish body has been occured naturally through the work of trimethylamine-NOxide
demethylase (TMAO)ase enzyme that breaked TMAO into formaldehyde and dimethylamine.
Formaldehyde fish has been occured during storage. This reserch aimed to determine of TMAOase activity
and its role in the formation of dimethylamine and formaldehyde lizard fish (Saurida tumbil) stored at
chilling temperature. Observations were made every 2 days for 16 days of storage. Analysis was performed
among other content of formaldehyde, dimethylamine, and specific activity of TMAOase enzyme. Result of
formaldehyde test increased during storage of day 0 was 0.22±0.00 ppm to 7.45±0.46 ppm on day 16. The
results of dimethylamine test increased during storage from 0,93±0,50 ppm at day 0 to 27.26±1.8 ppm on
day 16. The results of specific activity TMAOase lizardfish activity increased during storage that was 1.15 U/
mg on day 0, to 16.47 U/mg on day 16.


chilling temperature, dimethylamine, formaldehyde, lizardfish, trimethylamine-N-Oxide demethylase

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