PEG-MGF
Also known as PEGylated MGF, PEG Mechano-Growth Factor, pegylated mechano growth factor
PEG-MGF is a PEGylated form of Mechano-Growth Factor, a peptide from an IGF-1 splice variant, where the PEG conjugation targets half-life. A research-use profile of the splice-variant and pegylation angles.
PEG-MGF is best read as two ideas stacked together: a peptide that comes from an unusual place, and a chemical modification bolted onto it for a specific reason. The peptide is Mechano-Growth Factor, MGF, which is not a separate gene product but a splice variant of the IGF-1 gene. The 'PEG' is a polymer attached to it. Both halves are worth understanding on their own.
This page describes the splice-variant origin of MGF and the pegylation strategy applied to it. It avoids outcomes and use entirely; the substantive content is where the peptide comes from and what the PEG modification is engineered to change.
A polyethylene-glycol-conjugated version of Mechano-Growth Factor (MGF), the peptide derived from the IGF-1Ec splice variant. The distinguishing feature is the covalently attached PEG polymer chain, not a change to the peptide sequence itself; the peptide portion corresponds to the unique C-terminal region of the MGF splice variant.
MGF as an IGF-1 splice variant
The IGF-1 gene can be spliced into more than one product. Mechano-Growth Factor is the peptide associated with one such variant, historically labeled IGF-1Ec, which differs from the main IGF-1 form in its C-terminal region. That distinct C-terminal segment is what defines MGF as its own research entity: it is derived from the same gene as IGF-1 but is not the same molecule.
This splice-variant relationship is why MGF and IGF-1 analogs like IGF-1 LR3 are studied in adjacent contexts. They share a genetic origin but represent different processed products of it.
Why the PEG is attached
Small peptides are typically cleared quickly. PEGylation — the covalent attachment of a polyethylene-glycol chain — is a well-established protein-engineering strategy used to increase the hydrodynamic size of a molecule and slow its clearance, with the practical research aim of extending how long the peptide persists before degradation. PEG-MGF applies this strategy to the MGF peptide.
The important framing is that the PEG changes the molecule's pharmacokinetic profile — its persistence — rather than its underlying sequence. So PEG-MGF and unmodified MGF share the same peptide identity but differ in this half-life-oriented modification. That is a statement about molecular durability, not about any biological effect.
Handling a PEGylated peptide
Because the defining feature of PEG-MGF is a conjugated polymer, its identity on a certificate of analysis reflects the added PEG mass on top of the peptide. It is supplied lyophilized and, like other modified peptides, kept sealed, cold, and dry until a protocol calls for reconstitution. Verify any lot against its own certificate by batch number.
These are research areas the compound is associated with in the literature — not medical claims or intended uses.
Handling & storage
Supplied lyophilized. Kept sealed, cold, and dry; in research settings reconstituted with bacteriostatic water only when a protocol requires it, then refrigerated, and protected from repeated freeze–thaw. Handle per accepted laboratory practice.
Verify a certificate by lot →Common questions
Mechano-Growth Factor is the peptide from an IGF-1 splice variant (IGF-1Ec). It comes from the same gene as IGF-1 but differs in its C-terminal region, making it a distinct entity.
PEGylation attaches a polyethylene-glycol chain to increase the molecule's size and slow its clearance — a half-life-oriented modification. It changes persistence, not the peptide's sequence.
They share the same peptide identity; PEG-MGF adds the conjugated PEG polymer, which distinguishes it on a certificate of analysis by the added mass.
This monograph is a research-use reference. It describes composition and the contexts in which the compound has been studied — it is not medical advice, a description of effects, or a recommendation for use. Sold strictly for laboratory and research use; not for human or animal consumption.