GLP-2 TZ 30mg Peptide

Concentration at each diluent volume

30 mg of dry material reaches these concentrations in the volumes below. The figures are a unit conversion for preparing a laboratory stock solution, not a quantity to use.

GLP-2 TZ by the milligram

The same compound in every strength the catalogue carries, priced per milligram of material so the vials are comparable. Larger is not automatically cheaper.

The 30mg vial is the cheapest material in this range, which is this page. Sign in for pricing.

Per-unit figures are quoted in US and Canadian dollars so the vials stay comparable against each other. The price you are charged is the one in the currency selected at the top of the page, and it is converted from the same US dollar base as the figures here.

Identity by mass: the ions to expect

An electrospray source protonates the molecule rather than weighing it neutral, so a spectrum shows a series of charge states rather than the molecular weight itself. These are the m/z values 4,813.5 g/mol produces, and they are what a mass spectrum on a certificate for GLP-2 TZ has to match.

A peptide this size is normally reported at its doubly and triply charged states, and the singly charged ion may not appear at usable intensity at all. A spectrum showing only one of these is not a failed identity check.

What a certificate for GLP-2 TZ should carry

A purity percentage on its own is not checkable. These are the entries that make one verifiable, and their absence is the most common weakness in a research-peptide certificate.

• The chromatogram, not only the number

  A stated area percent with no trace behind it cannot be read for the shape of the main peak or for what eluted beside it. The HPLC interpreter walks through what a trace shows.

• Net peptide content, separately from gross mass

  A lyophilised peptide is a salt, usually of trifluoroacetic or acetic acid, plus residual water. The vial's stated milligrams are gross; net peptide content is the fraction of that mass which is the molecule. The two differ by ten to twenty percent routinely, and only one of them is what the price is per milligram of. The net peptide content calculator converts between them.

• The counterion, named

  Which salt form the powder is in changes the net content and the pH the powder dissolves at. A certificate that never names it leaves both unknowable.

• Water content, by a stated method

  Loss on drying and Karl Fischer water determination give different numbers, and a water figure with no method attached cannot be compared with anyone else's.

• A laboratory and a report identifier

  Without both, nothing on the document can be traced back to the laboratory that issued it. The red flag checker lists the rest.

What degrades this compound

Each of these follows from the molecule itself rather than from general peptide handling.

• Interfacial and surface loss

  4,813.5 g/mol, above the 3,500 g/mol range where this dominates

  A peptide this size unfolds at boundaries. It adsorbs to glass and to polypropylene, and it denatures at the air-water interface that shaking creates, which is why a vial is swirled rather than vortexed and why the diluent is run down the vial wall instead of squirted onto the powder. The failure is quiet: interfacial loss removes material without changing what is left behind, so the solution still assays clean at a concentration lower than the arithmetic says.