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10.1054/bjoc.2001.1810 143 SedoA.VlasicovK.BartkP.VespalecR.VicarJ.SimnekV.et al (2002)

PEGylation as a strategy for improving nanoparticle-based drug and gene delivery

H 2 S as a physiologic vasorelaxant: hypertension in mice with deletion of cystathionine -lyase

The modifications do two things: they make it far longer-lasting (active for roughly a day instead of minutes) and much harder for your body to switch off

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