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TB4-Frag is a short-chain tetrapeptide composed of four amino acids: N-acetyl-seryl-aspartyl-lysyl-proline (Ac-SDKP), which corresponds to the first four amino acids in the 43-amino-acid TB4 sequence. It is available in an oral format and is part of a class of peptides commonly referred to as “bioregulators”—short sequences, typically two to four amino acids in length, that have been studied for their occurrence in biological systems. This information is provided for educational purposes only.
