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Melatonin improves photosynthetic capacity under salinity stress

#ResearchPublication #Pharmacology #Hemorrhoids #PreclinicalResearch #Inflammation #Antioxidant #NutraceuticalResearch To view or add a comment, sign in STRUCTUREACTIVITY RELATIONSHIPS (SAR) Where chemistry defines clinical effect Small structural changes major pharmacologic outcomes Functional groups Hydrogen bonding & ionic interactions or potency Stereochemistry Enantiomers differ in efficacy, safety, and metabolism Lipophilicity (logP) Controls membrane penetration, tissue distribution, CNS access pKa & ionization Determines absorption, bioavailability, and receptor binding Ring systems & rigidity Influence receptor selectivity and intrinsic activity Metabolic hotspots Steric shielding reduces CYP metabolism half-life Key insight: Clinical response begins at the molecular level dose optimization starts with structure optimization

The selective serotonin reuptake inhibitor citalopram decreases human immunodeficiency virus receptor and coreceptor expression in immune cells

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