flash chromatography , bioconjugation , solid-phase peptide synthesis (SPPS), UV-Vis, preparative HPLC, cleavage, solution-phase organic synthesis, coupling cycles, Hplc, HIC, fplc, chemoselectivity, coupling-reagent selection, deprotection, conjugation reactions, analytical characterization, purification workflows, resin handling, amide-bond formation, Sec, LC-MS, UPLC, Nmr, protecting-group strategies