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Research Use Only·Not for human or animal consumption·21+

PepXtide

Peptide library

Venom

7 compounds in the library are grouped under Venom. Chain lengths run from 12 to 36 residues. None are in our catalogue — every entry here is reference only.

7 compounds

All 204 compounds

Every Venom compound in the library

Alpha-conotoxin ImI

12 residues · 1352 Da · 91 atoms

Twelve residues, the smallest conotoxin here, with the same nested bond pattern as conotoxin GI. Four of its twelve residues are cysteine.

Reference entry · not stocked

Apamin

18 residues · 2027 Da · 138 atoms

Eighteen residues with two disulfides pulling the ends toward the middle, so a short helix at the back is clamped against the front of the chain.

Reference entry · not stocked

Chlorotoxin

36 residues · 3997 Da · 269 atoms

Thirty-six residues with four disulfides, tying it for the most bonded structure here alongside hepcidin. Eight cysteines, all paired.

Reference entry · not stocked

Conotoxin GI

13 residues · 1438 Da · 97 atoms

Thirteen residues closed by two disulfides that nest inside one another rather than crossing. Cone snail venoms are built from small peptides like this, each one folded by its bonds into a rigid shape.

Reference entry · not stocked

Mast cell degranulating peptide

22 residues · 2587 Da · 178 atoms

Twenty-two residues sharing apamin's two-disulfide plan and its cysteine spacing. Both come from the same venom, and both are here.

Reference entry · not stocked

Sarafotoxin S6b

21 residues · 2515 Da · 172 atoms

Twenty-one residues with two nested disulfides. Almost identical in shape to the endothelins, which are human signalling peptides, and all of them are in the library. A venom and a hormone built to the same plan.

Reference entry · not stocked

Ziconotide

25 residues · 2639 Da · 177 atoms

Twenty-five residues from cone snail venom, folded by three disulfides. Two of its cysteines sit next to each other in the chain and bond to opposite ends, which is what pins the whole structure together.

Reference entry · not stocked

Other classes

See what we stock

This is a reference index, not a catalogue. Most entries are compounds we do not sell, and they are marked as such. Sequences, residue counts and molecular weights are published properties of the molecule, given for identification. Nothing here describes an application, benefit, dose, route or outcome, and no entry is an offer to supply. Materials sold by PepXtide are for laboratory research use only and have not been evaluated by the FDA.