Selank — research reference, shipped from Colombia

Presentations and visible prices

The price above is the public value per vial. Availability and batch documentation are confirmed before the quotation is accepted.

Selank: a heptapeptide analog of tuftsin

Tuftsin is the peptide Selank is declared to be an analog of, per the catalog's structural classification. This lineage distinguishes it from other references in the same neuromodulation category that derive from different precursors, such as corticotropin or sortilin.

The name Selank identifies this reference unambiguously in the technical catalog and should be used the same way in the request, the quote, and the receiving record, without abbreviating it or confusing it with other heptapeptide neuromodulation references. The catalog code SK10 accompanies that identification and can be cited alongside the name to reduce any ambiguity in an order with several lines. Unlike a cyclic peptide, an open seven-amino-acid chain like Selank's does not require verifying a ring closure: the certificate's mass spectrometry confirms the full length of the declared linear sequence.

Selank's price: always in its own commercial block

Whoever quotes Selank checks that value in this page's commercial block at the time of the request, without assuming it matches another neuromodulation reference or a previous quote.

That figure is verifiable catalog data, not a value judgment about the reference. The institutional buyer can check Selank's current price directly in this listing's commercial block at the time of quoting, and compare it with any other neuromodulation reference before finalizing the order. That price, along with code SK10, should be repeated on the proof of payment and the receiving record, so inventory logging does not depend on memorizing which heptapeptide in the category corresponds to each payment.

Selank and Semax: two heptapeptides, two different precursors

Selank and Semax share chain length — both are heptapeptides — but derive from different precursors: Selank from tuftsin, and Semax from the 4-7 fragment of corticotropin. They are structurally related references by length, not by origin.

This comparison is catalog classification, useful for whoever puts together an institutional request covering several neuromodulation references and needs to distinguish them precisely beyond the number of amino acids they share. Neither listing describes what happens in an organism: both are limited to the structural classification declared by the catalog.

A single 10 mg presentation: declared physical form

Selank's 10 mg presentation is declared by mass, corresponding to a lyophilized powder in a vial under the catalog's criterion. It is the only presentation currently active for this reference.

The receiving laboratory sets its own protocol for subsequent handling of the lyophilized powder; this listing does not describe or replace it, and limits itself to stating the presentation and its current reference price.

The Janoshik certificate and what is not yet stated

Selank's certificate of analysis is issued by Janoshik Analytical, per lot, with HPLC for purity and mass spectrometry for identity, upon institutional request and subject to documentary availability. The two techniques answer different questions: liquid chromatography separates and quantifies purity, and mass spectrometry confirms that the molecule matches the declared identity.

This listing does not publish a purity figure for Selank or a complete amino-acid sequence. CAS number, molecular formula, and molecular weight remain visibly pending until specific documentary support exists for the corresponding lot, the same documentary treatment given to Semax on its own catalog listing.

Quoting, shipping, and documentary closure

Shipping rates to Bogotá and to other destinations within the country are on the site's shipping information page, confirmed at the time of the quote. The declared storage condition, currently 2–8 °C, protected from light, should be arranged before delivery. Outside Colombia, this reference ships to 5 countries (Costa Rica, Ecuador, United States, Mexico and Puerto Rico), from US$57; the rate for each country is listed on the site's international shipping page.

The order is logged, confirmed in writing in the institutional quote, and only afterward is payment coordinated. The purchase file brings together the request, the quote, proof of payment, shipping, receipt, and the lot's COA when requested.

Frequently asked questions about Selank