DL-Penicillamine

DL-Penicillamine (CAS No.: 52-66-4) is a small molecule thiol containing amino acid derivative and racemic penicillamine analog primarily classified as a metal chelation and chemical biology research reagent for mechanistic studies in redox active metal homeostasis, sulfur exchange chemistry, and extracellular matrix biology; in biomedical research it is widely used as a probe compound to investigate copper coordination behavior, where metal binding is generally described by formation of ligand to metal complexes, and to model thiol disulfide interchange processes that can alter cystine related chemical equilibria and downstream cellular stress responses, while additional experimental literature indicates modulation of immune associated biology through suppression of primary immune responses and reduced T cell activity in vitro with comparatively limited direct effects on B cell activity under tested conditions; reported functional effects also include interference with collagen cross link formation and cleavage of newly formed cross links, together with elastin related alterations in perichondrial and periosteal tissues and growth inhibition phenotypes in preclinical systems, supporting its placement in discovery programs focused on connective tissue remodeling, immunoregulation, toxicology, and antidote combination research in animal models of metal intoxication; because standardized potency metrics are context dependent and not uniformly reported across assay formats for this compound, in vitro activity is typically characterized qualitatively within concentration windows that often span micromolar to higher micromolar ranges depending on the readout, matrix composition, and metal ion availability, and experimental applications in cell based assays, biochemical chelation studies, and rodent pharmacology generally use concentrations or doses selected according to specific experimental designs, exposure durations, and research objectives.