Peroxisomes: Membrane-bound, micro body organelles
that Essential unsaturated fatty acid elongation C20:4 with ethyl group
-CH2-CH2- conversion to cis double bond ^H>C=C<^H in peroxisomes
is negative ΔG_Hess=-61,8 kJ/mol free energy change, but minimized
reaching equilibrium mixture ΔG_min=ΔG_eq=-48,1 kJ/mol.
CATALASE in complex reaction sequence favors stabile unsaturated
fatty acid product efficiency 100%:
K_eq=10^8,43=
because erasing peroxide H₂O₂ to zero [H₂O₂]=0 mol/liter and
process velocity limits only dehydrogenase enzyme. It favors velocity
of peroxide 2H-O-O-H conversion in to biological goods
oxygen in water and heat
O_2aqua + 2H₂O + Q thirty million times 3010⁶.


Two H₂O₂ hydrogen peroxide sources from nature
at presence of oxygen in water medium O_2aqua+ H₂O ,
since 500 M-years. Oxygen concentration in atmosphere 20,95%
volume fraction (volume pro centum in air) disolutes in pure
distilled water oxygen [O₂] =2.10210^-4M (mol/Liter) concentration at 25 ^oC.

1. Heavy metal coordinative compounds having high oxidation number
iron(III) Fe³⁺, Back to the catalase tutorial.
cooper(II) Cu²⁺ ,
manganesium(IV) Mn⁴⁺,
as well pollutant lead(IV) Pb⁴⁺ .

2. Ionization radiation:
ultraviolet UV,
x-ray,
gamma g radiation,
beta particles ( and ),
alpha particles .

Human body 70 kg mass each second chemical elements
as carbon-14 isotopes and
potasium-40 isotopes

irradiate 7000 beta particles un  and high radiation energy absorbed forming in

O₂ + H₂O medium of tissues 10¹³ peroxide H₂O₂ molecules per second.

Back to the catalase tutorial.