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Deep Dive 5 min read read

TB-500 vs Thymosin Beta-4

By Peptide Chemist January 4, 2026

TB-500 is a synthetic fraction of the protein Thymosin Beta-4. While Tß4 is a large protein, TB-500 represents the active domain responsible for actin binding.

We compare the molecular weight, stability, and research applications of the full protein versus the fragment.