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The ser/gly synthesis pathway provides one-carbon precursors for the synthesis of nucleotides (Figure S3A)
Expert Rev Clin Pharmacol 6(3):323332 Uckert S et al (2001) Phosphodiesterase isoenzymes as pharmacological targets in the treatment of male erectile dysfunction
Many protocols are time-based (for example, evening use to match circadian goals) and cycle-based (used for a defined period, then paused)
Conover CA, Lee PD, Kanaley JA, Clarkson JT, Jensen MD
This depends on both metabolism and excretion, and so each drug will have a different half-life
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