Guides
Knowledge for everyday lab work: analytics, quality assurance, storage and shipping of research peptides – factual, with no application or effect claims.
Research Use OnlyGLP-3 is a synthetic peptide that addresses the GIP, GLP-1 and glucagon receptors. This guide covers its structure, receptor profile, laboratory testing and storage for in-vitro research.
Read more: GLP-3: triple agonist for in-vitro research →BPC-157 is a synthetic pentadecapeptide without end-group modification whose sequence is traced back to a gastric juice protein described in the literature. This guide explains the naming, structure, distinction from related fragments, analytics and storage of the reagent.
Read more: BPC-157: structure, analytics and handling in research →TB-500 denotes the N-terminally acetylated heptapeptide Ac-LKKTETQ from thymosin β4. This guide explains the naming, the structure and the distinction from related molecules, as well as the analytics and storage of the laboratory reagent.
Read more: TB-500: structure, analytics and handling in research →MT1 and MT2 are two structurally distinct analogues of α-MSH: a linear chain of 13 residues and a heptapeptide closed by a lactam bridge. This guide explains the naming, structure, expected masses, typical by-products and storage of the lyophilisates.
Read more: Melanotan I and II: structure, analytics and handling in research →In GHK-Cu, the unmodified tripeptide Gly-His-Lys binds a copper(II) ion. This guide explains the naming, the copper binding, the distinction from related molecules, the expected masses in the certificate of analysis, and the storage and handling of the reagent.
Read more: GHK-Cu: structure, analytics and handling in research →CJC-1295 (No DAC) and Ipamorelin come from two separate peptide families of the GH axis and are listed in the catalogue both individually and as a blend. This guide explains their naming, chemical modifications, expected masses, typical by-products and how to handle the lyophilisate in the laboratory.
Read more: CJC-1295 and Ipamorelin: structure, analytics and handling in research →Semax and Selank are linear heptapeptides with the same Pro-Gly-Pro ending, but they differ in origin and charge character. This guide explains their structure, how they differ from related molecules, expected masses, typical by-products and the storage of the lyophilisates.
Read more: Semax and Selank: structure, analytics and handling in research →Tesamorelin is an N-terminally acylated analogue of human GHRH comprising 44 amino acids. This guide explains its naming, its structure and how it differs from related peptides, as well as the analytics and storage of the laboratory reagent.
Read more: Tesamorelin: structure, analytics and handling in research →MOTS-c is an unmodified, linear peptide of 16 amino acids whose sequence is encoded in the mitochondrial genome. This guide explains its structure, how it differs from related molecules, how to check certificates of analysis, and the storage and handling of the lyophilisate.
Read more: MOTS-c: structure, analytics and handling in research →Cagrilintide is a lipidated analogue of human amylin comprising 37 amino acids, with six substitutions, a disulfide bridge and a C20 fatty diacid bound via γ-glutamic acid. This guide explains its naming, its structure and how it differs from amylin, pramlintide and calcitonin, as well as the analytics and storage of the laboratory reagent.
Read more: Cagrilintide: structure, analytics and handling in research →Test method, purity in percent, test date, laboratory: a COA is only as good as the information it contains. How to check whether a certificate matches the vial in your hand.
Read more: How to read a certificate of analysis (COA) →Two methods, two questions: HPLC answers “how pure?”, mass spectrometry “is it the right molecule?”. What lies behind peak, retention time and m/z.
Read more: HPLC and mass spectrometry: basics of peptide analytics →Purity is not the same as content. Anyone comparing COAs should be able to distinguish area percent, net peptide content and typical by-products of peptide synthesis.
Read more: Purity of research peptides: what the percentages mean →Dry, cold, dark: lyophilisates are robust but not indestructible. The key rules for unopened vials, opened vials and solutions.
Read more: Storing lyophilised peptides: temperature, light, humidity →From Germany to the laboratory: how vials are packed, which transit times apply, when a tracking number arrives and what to check when the goods are received.
Read more: Shipping research peptides: packaging, transit times, receipt of goods →How quality control works at GPeptides: from goods receipt through regular external analysis to the published certificate. Material without a published certificate is marked as “pending”.
Read more: Quality control: from raw material to certificate →The articles are written by the operator and updated whenever processes change; the date is shown beneath each heading. Questions not covered here can be sent via the contact page.