An introduction to TB-500 as a Thymosin beta-4 fragment reference material used in cytoskeletal research contexts.
What it is
TB-500 is the common designation for a Thymosin beta-4 fragment, supplied as a research-use-only reference peptide. It corresponds to the actin-binding region of the parent Thymosin beta-4 protein and is catalogued under the cytoskeletal research category. Analytical identifiers include CAS number 77591-33-4 and an approximate molecular weight near 4963 g/mol.
Relationship to Thymosin beta-4
Rather than the full protein, TB-500 represents a defined sequence segment associated with actin interaction. This focus on the functional region is what makes it a useful tool compound in studies of cytoskeletal dynamics, where investigators want a tractable peptide reagent rather than the larger native molecule.
Reference framing
As a chemical standard, TB-500 is described by purity, typically not less than 98% by HPLC, and by documented lot data. These descriptors support identity confirmation and batch-to-batch consistency. Everything in this collection concerns analytical identity, handling and the in-vitro research contexts where the peptide is cited.
What follows
Subsequent articles cover the peptide chemistry and stability, the cytoskeletal mechanisms studied in research models, the analytical methods used to verify identity and purity, and a literature survey with search-based sources. The framing stays strictly within laboratory reference-material use.
Every TB-500 order includes the sealed, lot-controlled vial, a measured ampoule of bacteriostatic water, and a printed handling & reconstitution card — everything to prepare the reference standard, in one box. Most suppliers ship the vial alone.