Important dilution note: Cloudiness after dilution is most commonly associated with non-pharmaceutical-grade dilution solution. Cloudy product concerns are not eligible for refund unless Pfizer pharmaceutical-grade dilution solution was used.

Vial Size: 3ml

Form: White Lyophilized Powder

CAS Number: 77591-33-4

Chemical Name: Thymosin Beta-4

Synonyms: TB-4; TB-500; Tβ4; Thymosin β4

Molecular Formula: C₂₁₂H₃₅₀N₅₆O₇₈S

Molecular Weight: 4,921.5 g/mol

Sequence: N-acetylated 43-amino acid cytoskeletal peptide (Ac-SDKPDMAEIEKFDKSKLKKTETQEKNPLPSKETIEQEKQAGES-OH); contains the canonical LKKTETQ actin-binding motif at residues 17–23

Purity: ≥98% (HPLC) — see batch COA

Form: Lyophilized white to off-white powder

Storage Conditions: Store at −20°C, desiccated, protected from light. Stable 24 months lyophilized.

Solubility: Soluble in sterile water or 0.5% acetic acid at ≥1 mg/mL

Receptor Activity: Studied for G-actin sequestration via the LKKTETQ motif, promotion of angiogenesis via HIF-1α pathway, regulation of cell migration, and inhibition of NF-κB-mediated inflammatory cytokines in preclinical cell and animal models

Certificate of Analysis: Available for all batches.

For research and laboratory use only. Not for human or animal consumption. This product has not been evaluated by the FDA and is not intended to diagnose, treat, cure, or prevent any disease or condition. For use by qualified research professionals only.