Gene / Protein: TMSB4X (Thymosin β4)
Length: 43 amino acids
Molecular formula: C₂₁₂H₃₅₀N₅₆O₇₈S
Molecular weight: ~4963 Da (per ChemicalBook)
CAS number: 77591‑33‑4
COA (certificate of analysis) provided:YES

TMSB4X and TB‑500 are closely related, but they are not the same molecule.
One is the full, naturally occurring human protein, and the other is a synthetic fragment designed to mimic only part of its activity. Laying them side‑by‑side makes the differences very clear.
TMSB4X vs TB‑500 — Clear, Structured Comparison
🧩 1. What each one actually is

TMSB4X (Thymosin β4) A full‑length, 43‑amino‑acid human peptide encoded by the TMSB4X gene. It is naturally present in almost every human cell and plays roles in cell migration, wound repair, angiogenesis, and inflammation modulation.

TB‑500 A synthetic 17‑amino‑acid fragment (the “active region”) of Thymosin β4. It is designed to replicate the actin‑binding and tissue‑repair functions of the parent peptide.

1. Accelerates Tissue Repair and Regeneration
Tβ4 is heavily involved in actin regulation, which controls how cells move and rebuild damaged tissue. This makes it central to:

wound closure

muscle repair

tendon and ligament recovery

organ‑level healing (heart, cornea, skin)

This is the core reason it’s studied in regenerative medicine.

2. Reduces Inflammation
Tβ4 helps regulate inflammatory cytokines and promotes resolution rather than suppression. Research links it to:

reduced swelling

faster recovery after injury

improved tissue quality during healing

It acts more like a repair‑coordinator than a blunt anti‑inflammatory.

3. Promotes Angiogenesis (New Blood Vessel Growth)
Tβ4 stimulates VEGF pathways, supporting:

improved blood flow

oxygen delivery to damaged tissues

faster recovery after ischemic injury

This is why it’s studied in cardiac repair and diabetic wound healing.

4. Protects Cells Under Stress
Tβ4 shows protective effects in models of:

oxidative stress

hypoxia

apoptosis (cell death)

This makes it relevant in research on heart, liver, and neurological protection.

5. Supports Skin Health & Cosmetic Repair
Because of its roles in collagen organization and inflammation control, Tβ4 is linked to:

improved skin texture

reduced scarring

enhanced hydration

faster healing after cosmetic procedures

It’s one of the most biologically active “cosmetic peptides” in research.

6. Immune System Modulation
Tβ4 helps balance immune responses by:

supporting T‑cell maturation

reducing excessive immune activation

promoting tissue‑protective macrophage activity

Legal and Safety Information;
Quantum Peptides products are provided exclusively for laboratory research and educational use.
They are not approved for human or veterinary applications.
These materials are not intended to diagnose, treat, cure, or prevent any medical condition.
All use must adhere to applicable laws and regulatory requirements.
“The photo is for illustration purposes only and includes as much product information as possible. Bottle labels wrap around the container and may vary slightly in design & between batches as part of our anti‑counterfeiting measures.”