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[DOI] [PMC free article] [PubMed] [Google Scholar] 41.Mahdavinasab S.M., Saghazadeh A., Motamed-Gorji N., Vaseghi S., Mohammadi M.R., Alichani R., Akhondzadeh S

Appl Microbiol Biotechnol 77(6):12331240 Sharma KG, Mason DL, Liu G, Rea PA, Bachhawat AK, Michaelis S (2002) Localization, regulation, and substrate transport properties of Bpt1p, a Saccharomyces cerevisiae MRP-type ABC transporter
Most peptide-tags are biochemically inert: they generally dont affect protein folding and solubility and dont interfere with protein function

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PMID: 42086560 Int J Nanomedicine Os Draconis-Derived Nanoparticles Improve Insomnia Symptoms by Activating Calcium-Dependent 5-HT Release and the Vagal-NTS Pathway

And this is not sufficient for the complexity of what long COVID actually is