Thymosin β4 (17–23), acetylated

Ac-LKKTETQ; thymosin β4 actin-binding fragment; sold elsewhere as “TB-500”

Identity

Sequence

Ac-LKKTETQ

Three-letter

Ac-Leu-Lys-Lys-Thr-Glu-Thr-Gln

Length

7 residues

Modifications

N-terminal acetyl

Formula

C38H68N10O14

Average mass

889.0 Da

CAS

885340-08-9

Specifications (per released lot)

Purity

≥ 98 % by RP-HPLC, 220 nm

Identity

ESI-MS; observed mass within 0.1 % of calculated

Form

White to off-white lyophilized powder

Counter-ion

Trifluoroacetate; acetate on request

Net peptide content

Reported per lot (typically 70–90 % of gross mass; the balance is counter-ion and water)

Vial sizes

5 mg · 10 mg · 25 mg net peptide; bulk on quotation

Storage

−20 °C, desiccated, protected from light. Ships at ambient temperature.

Documents

Lot certificate of analysis (COA library); safety data sheet in WHMIS 2015 format, enclosed with every shipment

Research context

The actin-binding heptapeptide motif of thymosin β4 (residues 17–23). Used in actin-sequestration and cell-migration assays and as a reference fragment in thymosin β4 research. This is the fragment, not full-length thymosin β4 (43 residues).

Literature context is provided to help laboratories identify the reagent. It is not a claim about effects in people and does not describe any use outside in-vitro or approved animal research.