The 43-residue protein is 4,963 daltons; the catalogue lists a 17-residue fragment; the certificate must say which

Published 26 October 2026 · REVIVE LAB UAE Research Desk · 5 min read
Native thymosin beta-4 is a 43-residue, acetylated, cysteine-free protein with a molecular mass of about 4,963 daltons. TB500 in this catalogue is listed as a thymosin beta-4 fragment of 17 amino acids, as the acetate salt, which has a mass well below that of the full protein. A certificate reporting an observed mass near 4,963 would describe the full protein; one reporting the fragment mass describes the fragment. The identity of the product is whichever mass the batch certificate confirms, and the pages on this site describe the listing as the catalogue states it.

The full protein

Thymosin beta-4 is the most abundant of the beta-thymosins, present at high concentration in most cells, with an acetylated amino terminus and the actin-binding motif LKKTET at residues 17 to 22. Its 43 residues contain no cysteine and no aromatic residues apart from one phenylalanine, and the protein is largely unstructured in solution. It is the molecule studied in the cardiac, wound and eye literature.

Recombinant and synthetic full-length thymosin beta-4 exist and are what the clinical programmes used.

The fragment

TB-500 as a trade name has been applied to synthetic peptides covering the actin-binding region of thymosin beta-4, of various lengths. The catalogue entry specifies 17 residues. A fragment lacks most of the full protein and is not the molecule the clinical literature describes; the page on the distinction between TB-500 and thymosin beta-4 sets this out. Its expected mass follows from its sequence and appears on the certificate.

The acetate in the name refers to the counterion, not to the acetylated terminus of the native protein.

What a reader checks

That the certificate mass matches the fragment the label describes, not the full protein and not some other length. In the blend, the fragment and BPC-157 give two separate masses in one spectrum, and both should be reported.

The BPC-157 + TB500 blend is supplied by REVIVE LAB UAE for laboratory research use only, with identity by mass spectrometry and purity by HPLC for each component of the batch. It is not for human or veterinary use, and no dosing, administration or protocol guidance is provided.

What it costs

FormatStrengthPriceAvailability
BPC-157 + TB500 Pack5 mg + 5 mgAED 510In stock

Delivery is AED 40 flat and free on orders over AED 700. Payment is cash on delivery anywhere in the UAE, or USDT (TRC20) in advance, which takes 5% off the order total.

Frequently asked

The full protein?

Thymosin beta-4 is the most abundant of the beta-thymosins, present at high concentration in most cells, with an acetylated amino terminus and the actin-binding motif LKKTET at residues 17 to 22. Its 43 residues contain no cysteine and no aromatic residues apart from one phenylalanine, and the protein is largely unstructured in solution. It is the molecule studied in the cardiac, wound and eye literature.

Does REVIVE LAB UAE provide dosing guidance?

No. REVIVE LAB UAE supplies research materials and provides no dosing, administration or protocol guidance of any kind. Every product is sold for laboratory research use only and is not for human or veterinary consumption.

How fast is delivery in the UAE?

Stock is held in Dubai. An order confirmed before 4 PM Dubai time is dispatched the same working day, reaching Dubai and Abu Dhabi the same day and the remaining emirates within 24 hours. Delivery is AED 40 flat and free over AED 700.

BPC-157 + TB500 Pack — in stock, dispatched from Dubai
HPLC-verified, lot certificate on every carton, 24-hour delivery nationwide. Browse the catalogue → All peptides UAE

Related reading

Supplied for laboratory research use only. Not for human or veterinary consumption. REVIVE LAB UAE provides no dosing, administration or protocol guidance.