Knowledge
Technical articles on the analysis, documentation and handling of peptides in the lab.
Peptide glossary: terms from analysis and the lab →Peptide comparisons: data side by side →
How to read a peptide certificate of analysis (CoA)
What a peptide certificate of analysis (CoA) should contain: identity, HPLC purity, peptide content and lot number, and how to check it against your delivery.
HPLC and mass spectrometry for peptides: what they show
What RP-HPLC, mass spectrometry and LC-MS tell you about a peptide: purity, identity, typical impurities, and what neither method measures.
Peptide content vs purity: the difference explained
Why 5 mg of lyophilisate need not be 5 mg of pure peptide: peptide content, HPLC purity, counterions and a worked example for lab stock solutions.
Storing peptides: fridge, freezer and lyophilisate
How to store lyophilised peptides: fridge or −20 °C, opening without condensation, aliquots in solution and sensitive amino acids. General lab practice.
Dissolving peptides: solubility for in vitro work
Getting peptides into solution step by step: estimate the charge, choose water, acid or DMSO, check the concentration. An approach for lab assays.
Qualifying a peptide supplier: a checklist for labs
What labs and procurement should ask for before the first peptide order: CoA, testing lab, traceability and incoming checks. With a checklist.
What Are Peptides? Peptide Chemistry Basics Explained
What peptides are, how they are built and why they matter in research: amino acids, peptide bonds, sequence, synthesis and modifications explained.
Buying Peptides: How to Identify a Reputable Supplier
What to look for when buying research peptides: analysis, lot traceability, price per mg, company details and delivery terms. With a checklist.
Peptide Nomenclature Explained: Why the Same Substance Has Several Names
Retatrutide, Reta, LY3437943: why research peptides carry several names, what code names, INN, INCI and CAS numbers mean, and how to keep track.
Sourcing Peptides in the EU: Shipping, Customs and Payment Overview
Ordering research peptides in the EU: shipping zones and delivery times, VAT for private and business customers, deliveries to Switzerland and payment methods.
Bacteriostatic Water for Laboratory Use: What You Need to Know
What bacteriostatic water (BAC water) is, how it differs from sterile water, when it suits lab work and what to look for when buying it.
Peptide Content and Batch Testing: What to Check Before Buying
What net peptide content means, how it is measured, why every lot needs its own CoA and how to check a lot step by step.