Selank is a stabilized tuftsin-derived peptide, and confirming both the core sequence and its stabilizing extension are intact is central to verifying a research lot.
Reversed-phase HPLC
HPLC separates the fully extended peptide from truncated or partially synthesized forms lacking the stabilizing addition, with purity read per understanding HPLC purity.
Mass spectrometry for identity
Mass spectrometry confirms the molecule's mass matches selank's full extended sequence described in its chemistry article rather than unmodified tuftsin fragment, a distinction covered generally in HPLC vs. mass spectrometry.
Why stability depends on complete synthesis
Selank's improved research stability over native tuftsin comes specifically from its C-terminal extension (see its mechanism of action); a lot missing that extension would behave more like the shorter-lived parent fragment and less like the intended stabilized analog, a consideration also relevant to the related stabilized neuropeptide semax.
Documentation to expect
A lot-specific certificate of analysis with HPLC purity and mass-spec identity — see how to read a CoA.
Product page: Selank research vials.
Research Use Only. Supplied strictly for laboratory research and development — not for human or veterinary use, consumption, or any therapeutic or diagnostic purpose. This article is research education, not usage guidance.