Is 5-Amino-1MQ a peptide?

No, and this is the single most common misconception about it. A peptide is a chain of amino acids joined by peptide bonds. 5-Amino-1MQ contains no amino acids and has no peptide bonds. It is a small synthetic organic molecule built on a quinoline ring system, closer in character to a conventional small-molecule drug candidate than to anything in the peptide catalogue it is usually listed beside. It is grouped with peptides by retailers, not by chemistry.

What does the name mean?

It is a structural description. The core is a quinolinium ion, a quinoline ring carrying a positive charge on its nitrogen. "1-methyl" says a methyl group sits on that nitrogen, which is what creates the permanent charge, and "5-amino" says an amine group sits at position 5 of the ring. Read that way the name is a set of assembly instructions rather than a code.

What is NNMT and why is it studied?

Nicotinamide N-methyltransferase is an enzyme that attaches a methyl group to nicotinamide. That reaction matters metabolically because nicotinamide is a precursor in the synthesis of NAD+, so methylating it diverts material away from that route. Research interest in inhibiting the enzyme follows from that: in cell and animal models, inhibition is studied in the context of nicotinamide handling and NAD+ metabolism. Our guide on [NAD+](/guides/what-is-nad) covers the coenzyme itself.

What is 5-Amino-1MQ studied for in research?

Published preclinical work uses it principally as a tool compound for inhibiting NNMT, which lets researchers ask what happens to a cell or model when that enzymatic step is blocked. Reported observations relate to metabolic measures in the specific models examined and depend on the model, the concentration and the duration. These are findings about those experimental systems, not established effects in humans.

Why does the permanent positive charge matter?

Because a quaternary ammonium compound carries its charge regardless of the pH around it, unlike a group that can gain or lose a proton. Permanently charged molecules dissolve readily in water and cross lipid membranes poorly, which shapes both how the compound behaves in a culture system and how it is formulated. It is a practical handling consideration rather than a biological one.

Do you sell 5-Amino-1MQ?

No. We do not stock it and there is no Certificate of Analysis for it in our library. It is covered here because it generates steady search interest and is persistently mislabelled as a peptide, which is worth correcting.

What is 5-Amino-1MQ?

6 min read · Updated October 2026 · MY PEPTIDES Research Team

Key facts

5-Amino-1MQ, written in full as 5-amino-1-methylquinolinium, is a small synthetic molecule built on a quinoline ring. It is not a peptide, despite almost always being sold and searched alongside them, and it contains no amino acids at all. In preclinical research it is studied as an inhibitor of nicotinamide N-methyltransferase, usually abbreviated NNMT, an enzyme that methylates nicotinamide and in doing so consumes a precursor used in NAD+ synthesis. The research interest follows from that relationship: inhibiting the enzyme is studied in the context of nicotinamide and NAD+ metabolism in cell and animal models. It is a quaternary ammonium compound, permanently positively charged, which affects how it behaves in solution. It holds no marketing authorisation anywhere and is not an approved medicine. MY PEPTIDES does not stock it. General information for laboratory context only, not medical advice.

The short answer

5-Amino-1MQ is not a peptide. It is worth leading with that, because it is sold next to peptides, searched next to peptides and listed in peptide catalogues, and none of that makes it one. There are no amino acids in it and no peptide bonds.

What it actually is: 5-amino-1-methylquinolinium, a small synthetic molecule built on a quinoline ring, permanently positively charged. In preclinical research it is studied as an inhibitor of the enzyme nicotinamide N-methyltransferase, almost always written NNMT.

Reading the name

The name is unusually informative once you know the convention. Quinoline is a two-ring aromatic system containing a nitrogen. Add a methyl group to that nitrogen and it becomes a quinolinium ion, carrying a positive charge that it cannot shed. The "1-methyl" part names that methyl group and its position; the "5-amino" part says an amine group sits at position 5 of the ring.

So the compound is a methylated quinoline with an amine on it. Chemically this is the sort of molecule a medicinal chemistry programme produces, not the sort a peptide synthesiser does, and the manufacturing, analysis and handling all follow the small-molecule conventions rather than the peptide ones. That has a practical edge: a certificate of analysis for a small molecule reports different things than one for a peptide, so comparing them like for like does not quite work.

The enzyme, and why anyone cares

NNMT does one simple thing: it attaches a methyl group to nicotinamide. The reason that matters is what nicotinamide is otherwise used for. It is a precursor in the synthesis of NAD+, the coenzyme central to a large amount of cellular metabolism, so methylating nicotinamide takes material out of that pathway.

That sets up the research question. If the enzyme consumes a precursor the cell also needs for NAD+ synthesis, what happens in a model when you block the enzyme? 5-Amino-1MQ is used as the tool to ask it, which is the compound's main role in the literature: not an object of study in its own right so much as an instrument for interrogating a metabolic step.

Reported observations in cell and animal models relate to metabolic measures in those specific systems. As with any tool compound, the findings are properties of the model, the concentration and the exposure, and the NAD+ pathway itself is covered separately in our NAD+ guide.

Why the mislabelling is worth correcting

Calling this a peptide is not a harmless shorthand, for two reasons.

The first is analytical. Peptide purity is conventionally established by HPLC with the figure reported against the target-peptide peak, and the numbers quoted in this market, the familiar 99%-plus, come from that convention. A small molecule is characterised differently, and a quoted purity figure means something different. If you are evaluating documentation, knowing which kind of molecule you are looking at determines which questions are the right ones.

The second is that it signals how much the seller knows or cares. A catalogue that files a quinolinium salt under peptides has not thought hard about what it is selling. That is not proof of anything about the material, but it is a reasonable prompt to ask more questions.

What the research does not establish

5-Amino-1MQ holds no marketing authorisation anywhere and is not an approved medicine in the UK or elsewhere. Preclinical work in cells and animal models does not establish effects in people, and the gap between an interesting metabolic finding in a model and a demonstrated human outcome is where most candidate compounds stop.

As with other unapproved compounds, supply for human medicinal use is unlawful under the Human Medicines Regulations 2012 irrespective of how a listing is worded, and material sold under this name is supplied for in-vitro laboratory research only. The framework is set out in our guide on whether peptides are legal in the UK.

Where MY PEPTIDES stands

We do not stock this compound. There is no Certificate of Analysis for it in our library and no product page for it on this site, and this guide is not an offer to supply it. If that ever changes it will change by a product appearing in the catalogue with a batch certificate attached, not by a line in a guide.

What we do supply, and the documentation standard we hold it to, is set out in our guide on certificates of analysis.

The bottom line

5-Amino-1MQ is a small synthetic quinolinium compound and not a peptide, used in preclinical research as a tool for inhibiting the enzyme NNMT and thereby probing nicotinamide and NAD+ metabolism. The findings belong to the models studied, it is not an approved medicine, and we do not supply it.

All compounds referenced on this site are discussed strictly in the context of in-vitro laboratory research. Nothing here is a medicine, a supplement or a therapeutic product, nothing here describes administration to humans or animals, and this guide is general information rather than medical, legal or research advice.

Frequently asked questions

Is 5-Amino-1MQ a peptide?: No, and this is the single most common misconception about it. A peptide is a chain of amino acids joined by peptide bonds. 5-Amino-1MQ contains no amino acids and has no peptide bonds. It is a small synthetic organic molecule built on a quinoline ring system, closer in character to a conventional small-molecule drug candidate than to anything in the peptide catalogue it is usually listed beside. It is grouped with peptides by retailers, not by chemistry.
What does the name mean?: It is a structural description. The core is a quinolinium ion, a quinoline ring carrying a positive charge on its nitrogen. "1-methyl" says a methyl group sits on that nitrogen, which is what creates the permanent charge, and "5-amino" says an amine group sits at position 5 of the ring. Read that way the name is a set of assembly instructions rather than a code.
What is NNMT and why is it studied?: Nicotinamide N-methyltransferase is an enzyme that attaches a methyl group to nicotinamide. That reaction matters metabolically because nicotinamide is a precursor in the synthesis of NAD+, so methylating it diverts material away from that route. Research interest in inhibiting the enzyme follows from that: in cell and animal models, inhibition is studied in the context of nicotinamide handling and NAD+ metabolism. Our guide on [NAD+](/guides/what-is-nad) covers the coenzyme itself.
What is 5-Amino-1MQ studied for in research?: Published preclinical work uses it principally as a tool compound for inhibiting NNMT, which lets researchers ask what happens to a cell or model when that enzymatic step is blocked. Reported observations relate to metabolic measures in the specific models examined and depend on the model, the concentration and the duration. These are findings about those experimental systems, not established effects in humans.
Why does the permanent positive charge matter?: Because a quaternary ammonium compound carries its charge regardless of the pH around it, unlike a group that can gain or lose a proton. Permanently charged molecules dissolve readily in water and cross lipid membranes poorly, which shapes both how the compound behaves in a culture system and how it is formulated. It is a practical handling consideration rather than a biological one.
Do you sell 5-Amino-1MQ?: No. We do not stock it and there is no Certificate of Analysis for it in our library. It is covered here because it generates steady search interest and is persistently mislabelled as a peptide, which is worth correcting.