Peptide Research Articles & Analytical Briefings
Peer-literature technical notes covering chromatographic verification, structural peptide comparisons, and in-vitro laboratory handling protocols.
Why RP-HPLC Alone Is Insufficient Without LC-MS Mass Confirmation
Chromatographic purity measures relative UV peak area at 214 nm, whereas electrospray LC-MS verifies molecular mass-to-charge ratios. Combining orthogonal HPLC-UV and ESI-MS eliminates co-eluting synthesis isomers in quantitative in-vitro assays.
Explore Testing Standards →Copper-Binding Tripeptides Compared: GHK-Cu vs AHK-Cu in Fibroblast Models
Glycyl-L-histidyl-L-lysine Cu(II) (401.9 g/mol) and Alanyl-L-histidyl-L-lysine Cu(II) (417.95 g/mol) differ by a single N-terminal methyl group yet exhibit distinct metalloproteinase and collagen-I transcriptional profiles in cultured dermal fibroblasts.
Browse Tissue Biology Reagents →Mitochondrial-Derived Peptides & NNMT Inhibition: MOTS-c, SS-31 & 5-Amino-1MQ
Comparing 12S rRNA-encoded 16-mer MOTS-c (AMPK/AICAR pathway), cardiolipin-targeting tetrapeptide SS-31, and small-molecule nicotinamide N-methyltransferase (NNMT) probes in cellular NAD+ flux experiments.
Browse Metabolic Research →Preventing Freeze-Thaw Aggregation in Reconstituted Lyophilized Peptides
Best practices for desiccator temperature equilibration, solvent pH selection, low-binding polypropylene single-use aliquoting, and headspace oxidation control for Cys- and Met-containing sequences.
Read Full Handling Guide →