Comparison

Epitalon vs TB-500

Function

While Epitalon is reported to increase lifespan and reduce tumor incidence in animals, and to influence differentiation of neural and mesenchymal stem cells; is studied as an epigenetic regulatory peptide36, TB-500 is studied for enhancing musculoskeletal and cardiac repair, wound healing, and promoting cell migration and differentiation via actin cytoskeleton remodeling21255.

Mechanism

While Epitalon works as a synthetic tetrapeptide, Ala-Glu-Asp-Gly (AEDG), that has been shown to bind histones and modulate gene expression and chromatin state, with reported effects on pineal function, neurogenesis, and longevity in animal models36, TB-500 is a synthetic peptide comprising the LKKTETQ actin-binding motif of thymosin beta-4 that binds G-actin, sequesters actin monomers, and promotes cell migration, angiogenesis, and tissue repair1255.

Length and Sequence

Epitalon is 4 amino acids long, whereas TB-500 is longer as it has a length of 7 amino acids. Epitalon is made up of a sequence of Alanine, Glutamic acid, Aspartic acid, Glycine. TB-500 is made up of a sequence of Lysine, Lysine, Lysine, Threonine, Glutamic acid, Threonine, Glutamine.

Receptor

Epitalon

Binds nuclear histone proteins (H1, H2B, H3, H4) rather than a classic membrane receptor36

TB-500

Binds monomeric actin (G-actin) rather than a classical cell-surface receptor, modulating actin polymerization at barbed and pointed ends55

Organism or Origin

Epitalon

Synthetic peptide modeled after a pineal gland peptide fraction; not directly encoded as a standalone peptide in humans36

TB-500

Synthetic derivative of human thymosin beta-4, whose full-length 43-amino-acid protein is abundant in mammalian tissues21279

Gene

Epitalon

Not assigned in the current dataset.

TB-500

TMSB4X

Sources

36AEDG Peptide (Epitalon) Stimulates Gene Expression and Protein ..., https://pmc.ncbi.nlm.nih.gov/articles/PMC7037223/
2TB-500 (Thymosin Beta-4) | Peptide Biologix, https://peptidebiologix.com/tb-500
12Thymosin Beta-4 vs TB-500 | What to Know in 2024, https://www.peptidesciences.com/peptide-research/thymosin-beta-4-vs-tb-500
79TMSB4X Gene: Function, Research, and Clinical Applications, https://learn.mapmygenome.in/genemap/tmsb4x