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Besides being a potential source of more reactive free radicals via Fenton reaction, physiological generation of H 2 O 2 fulfills a second messenger role and can be transported across membranes by aquaporins, a family of proteins that act as peroxiporins (Sies, 2014)
Cysteine is the rate-limiting step
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A typical course involves 6 to 8 weekly sessions followed by monthly maintenance
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