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Met-Enkephalin

Tyr-Gly-Gly-Phe-Met

One of the two enkephalins, the brain's own opioid peptides, identified in 1975.

Vial size

NeuropeptidesHPLC · MS · Endotoxin

Met-Enkephalin 10 mg research vial

What it is

Met-enkephalin is a five-residue opioid peptide cut from proenkephalin. It and Leu-enkephalin were the first endogenous opioid peptides identified.

What researchers study

  • Agonist at δ- and μ-opioid receptors.
  • Also studied as the "opioid growth factor" in cell proliferation research.

Specifications

SequenceYGGFM
Molecular formulaC27H35N5O7S
Molecular weight573.7 g/mol
PubChemCID 443363
FormLyophilized powder
Vial sizes10 mg
StorageUnopened: 2 to 8 °C, away from light

How each lot is tested

Samples from every lot go to an independent, ISO/IEC 17025 accredited lab. Its report covers three tests:

  • Purity by reversed-phase HPLC: the main peak's share of the total peak area.
  • Identity by mass spectrometry: the observed mass should match the expected 573.7 g/mol.
  • Endotoxin, measured for every lot.

The lot number on your vial is the number on its report. How to check a certificate of analysis walks through what to look for.

The amount on the label is the weight of the powder. Besides the peptide it includes counter-ions and some water; Purity vs. peptide content explains the difference.

Storage and handling

Store unopened vials at 2 to 8 °C, away from light, as printed on the label. Let a cold vial reach room temperature before you open it, so moisture doesn't condense on the powder. More bench habits are in Handling.

For laboratory research use only. Not for human or veterinary use. This page describes the compound and published research on it. It is not a recommendation for any use.