ThymosinAlpha-1

Thymosin Alpha-1 in Canada is supplied by Horizon Peptides as a lyophilized powder in sealed 10 mg research vials, available singly or in 3-vial and 10-vial packs. Thymosin Alpha-1 is a 28-residue thymic peptide studied in immune-signalling research models.

Thymosin Alpha-1 is a defined 28-residue sequence with a molecular weight of 3108.3, originally isolated from thymus tissue. Unlike the fraction-based preparations from the same source, it is a single characterised molecule.

That difference matters methodologically. A tissue extract may contain many components, so attributing an observation to any one of them is difficult; a single sequence removes that ambiguity entirely, which is why it largely superseded extract preparations in controlled work.

The move from extract to defined sequence is a pattern that repeats across peptide research history. Several preparations still in use date from an era when a fraction could be named and studied long before its active components were separated, and this sequence represents the later stage of that process.

Research using it concerns immune-signalling pathways and T-cell related models in cell culture, often with a fraction preparation run alongside as a comparison arm.