TB500 (FRAG)

Research Use Only. Not for Human Consumption.

TB500 (FRAG) is supplied by Nexus as a 10mg lyophilized research material categorized under Healing & Recovery. The supplied chemistry record identifies this SKU as a thymosin beta-4 active fragment rather than a full-length TB-500 / thymosin beta-4 product. Because fragment and full-length thymosin labels are frequently conflated in vendor catalogs, this page treats the compound narrowly: TB-500 fragment 17-23, commonly represented as N-acetylated LKKTETQ.

Nexus therefore does not add unsupported claims, therapeutic interpretations, dosage guidance, or extrapolated literature summaries for this product page.

Compound Overview

TB500 (FRAG) is described in the provided research record as a short thymosin beta-4 active fragment. The structural description is TB-500 fragment 17-23, commonly represented as N-acetylated LKKTETQ. The amino-acid sequence supplied for the fragment is LKKTETQ, with the display representation Ac-Leu-Lys-Lys-Thr-Glu-Thr-Gln.

This distinction matters for catalog accuracy. A short 7-residue active fragment is chemically distinct from full-length thymosin beta-4 / TB-500 style products. The source record specifically flags that vendor labeling can conflate full-length TB-4 or TB-500 material with the 7-residue fragment. For this reason, Nexus labels this product as TB500 (FRAG) and presents the compound by its fragment classification, sequence representation, molecular formula, and computed molecular weight rather than implying equivalence with a full-length peptide.

The listed research size is 10mg, associated with SKU B10F. Intended use is restricted to in-vitro research workflows only. This material is not supplied for human consumption, veterinary use, therapeutic use, diagnostic use, disease prevention, or any bodily application.

Research Background & Published Literature

The research data available for TB500 (FRAG) supports a limited, chemistry-centered background. It identifies the product as a thymosin beta-4 active fragment and notes that the relevant fragment is commonly represented as N-acetylated LKKTETQ. No peer-reviewed citation list was supplied with this SKU, and the available record does not provide study abstracts, experimental models, assay conditions, or literature-derived mechanism claims.

Because the source data is intentionally narrow, Nexus does not extend this section with inferred biological outcomes or human-use conclusions. The product page should be read as a technical identity profile for an in-vitro research reagent: classification, fragment sequence, molecular formula, molecular weight, physical form, storage guidance, and documentation expectations.

The provided public reference sources for fragment-level chemical context are listed below. They are included only as source references supplied with the research record, not as expanded clinical, therapeutic, or dosing support:

Researchers reviewing the literature around this compound can use the peer-reviewed resources below for additional context on mechanism of action, signaling pathways, and controlled laboratory research applications:

• Bock-Marquette et al. (2004) — Nature
• Wyczółkowska et al. (2007) — Peptides

Storage, Handling & Stability Guidelines

Use the applicable lot/source record for storage of unopened material. Any preparation, aliquoting, temperature, or post-reconstitution hold condition must be established by a qualified laboratory under a validated SOP; this page does not establish a stability window.

• Confirm storage and handling against the final lot label, the applicable Safety Data Sheet (SDS), and a laboratory-validated SOP; this dossier does not establish a temperature.
• Use a validated laboratory SOP and the applicable lot/source record for any preparation or post-reconstitution handling.
• Use appropriate laboratory PPE and handling controls for research reagents.
• Label aliquots clearly with compound name, sequence or fragment identifier where applicable, preparation date, and operator initials.

The source data does not specify a reconstitution solvent, concentration, post-reconstitution expiration interval, or validated stability study. Nexus therefore does not provide solvent selection, dosage, or timing guidance for this SKU.

Quality Assurance & Lab Verification

The Certificate of Analysis for this catalog item is pending. No provisional batch, assay, method, analyst, or release data is published in this product dossier. Check the Lab Verified archive for documentation status.