Tramadol is an analgesic drug that binds to specific opioid receptors. It may contribute to the inhibition of neuronal
re-uptake of noradrenaline. Catalase is a key enzyme for degrading H2O2 in cells and has various isoforms with different
structures and kinetics properties. In this research, the effect of tramadol on the activity of catalase of Pseudomonas
and mouse liver was investigated and compared. Tramadol could inhibit Pseudomonas catalase with mixed inhibition
while inhibiting mouse liver catalase in a non-competitive manner. The Ki and IC50 values were determined as 0.45 and
1.5 mM for Pseudomonas and 2.8 and 2.5 mM for mouse liver, respectively. SDS-PAGE of partially purified catalases determined
different molecular weights for Pseudomonas (Mw 54 kDa) and mouse liver (61 kDa).
Keywords: Bacteria, Drug, Enzyme, Inhibition, Mouse liver.
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