Sale!

Thymosin Beta-4 (Full-Length / Timbetasin)

Made in the USA

Two Series. Local or Global Shipping

Thymosin Beta-4 (Full-Length / Timbetasin)

Name: Thymosin Beta-4 (Full-Length / Timbetasin)
SKU: TB4-THYMOSIN-BETA-4
Availability: InStock

Price range: $70.00 through $110.00

Thymosin Beta-4 is a 43-amino-acid peptide and the most abundant member of the beta-thymosin family, distinguished by an N-terminally acetylated serine residue. It has the molecular formula C₂₁₂H₃₅₀N₅₆O₇₈S, a molecular weight of approximately 4963 g/mol, and CAS number 77591-33-4. Encoded by the TMSB4X gene, it was first isolated from calf thymus tissue in 1981. The peptide binds and sequesters G-actin monomers, regulating actin polymerization in eukaryotic cells. Supplied as a white to off-white lyophilized powder, soluble in water, stored refrigerated at 2–8 °C. This product is strictly for research purposes only.

3 Day FAST Shipping

99%+ Purity Tests

Ships from Arizona & Worldwide

USA Lab Tested

Strength

Purchase Option

Clear

Location	Price

Location	Price

WHOLESALE KIT — IMPORTANT ORDER INFORMATION

This is a wholesale 10-vial program. Kits are fulfilled directly through our international manufacturing and fulfillment network rather than from standard retail inventory, allowing us to offer genuine bulk pricing.

Please review the following before adding a kit to your cart:

Longer processing time: Wholesale kit orders may require 5–10 business days of processing before carrier transit begins. This is longer than standard single-vial orders.
Ships internationally: Wholesale kits are fulfilled from Hong Kong and shipped worldwide. International transit and customs processing may add additional delivery time.
Wholesale packaging: Vials may arrive without individual retail packaging or retail-style labels. Product identification and batch information should be verified using your order details and the applicable COA / batch documentation.
Lyophilized powder appearance may vary: Freeze-dried powder may shift, fragment, or separate during transportation. Changes in the physical appearance of the lyophilized puck are not, by themselves, considered a product defect.

Read Full Wholesale Kit Details →

Required Confirmation

I understand that this is a wholesale 10-vial kit fulfilled from Hong Kong, that processing and delivery take longer than standard local-stock orders, that wholesale packaging may differ from retail packaging, and that the physical appearance of lyophilized powder may change during transit.

YOU MUST ACCEPT THE WHOLESALE KIT SHIPPING NOTICE BEFORE ADDING THIS PRODUCT TO YOUR CART.

Proudly Made in the USA

USA-manufactured and USA-tested research products with fulfillment from Arizona, the UK, Australia, Europe, or Hong Kong.

USA Manufactured

USA Lab Tested

Ships from Arizona, US

Description
Additional information

✓ Third-Party Lab Tested

Certificate of Analysis

Independent laboratory testing confirms purity and composition of this research peptide.

99.230%

Purity

A2926079

Batch

August 2026

Date

View Certificate →

Overview

Thymosin Beta-4 is a 43-amino-acid peptide encoded by the TMSB4X gene and the most abundant member of the beta-thymosin family. It has the molecular formula C₂₁₂H₃₅₀N₅₆O₇₈S, a molecular weight of approximately 4963 g/mol, and CAS number 77591-33-4. The peptide was first isolated from calf thymus tissue in 1981 and has since been studied as a principal G-actin–sequestering protein in mammalian cells.

Structurally, Thymosin Beta-4 carries an N-terminal acetyl group on its serine residue. Its full sequence is Ac-Ser-Asp-Lys-Pro-Asp-Met-Ala-Glu-Ile-Glu-Lys-Phe-Asp-Lys-Ser-Lys-Leu-Lys-Lys-Thr-Glu-Thr-Gln-Glu-Lys-Asn-Pro-Leu-Pro-Ser-Lys-Glu-Thr-Ile-Glu-Gln-Glu-Lys-Gln-Ala-Gly-Glu-Ser. The central LKKTETQ motif is the defining actin-binding domain and has been the focus of in-vitro biochemical characterization.

This product is strictly for research purposes only. Not approved for human or animal use.

PubChem Reference: View compound profile on NIH PubChem

This product is strictly for research purposes only. Not approved for human or animal use.

Key Characteristics

MOLECULAR PROFILE

Formula: C₂₁₂H₃₅₀N₅₆O₇₈S

Weight: 4963 g/mol

CAS: 77591-33-4

Structure: 43 amino acid acetylated peptide

PHYSICAL PROPERTIES

Form: White to off-white lyophilized powder

Solubility: Soluble in water

Purity: ≥98% (HPLC)

Storage: Keep refrigerated 36‑46 °F (2‑8 °C)

Additional information

Weight	0.08 lbs
Dimensions	0.87 × 1.18 × 0.87 in
Peptide	Thymosin β4 (full-length 43-aa; Timbetasin)
Strength	5mg, 10mg
CAS Number	77591-33-4
PubChem CID	16132341
Purity	≥99% (third-party HPLC and mass spectrometry verified)
Form	Lyophilized powder
Storage	Store at −20°C (−4°F) for long-term storage or 4°C (39°F) for short-term storage; avoid repeated freeze-thaw cycles.
Testing	Batch-specific COA included
Origin	Manufactured in the US
Purchase Option	Fast Stock — From 1 Vial