Proteinase-Activated Receptor-Activating Peptides (PAR-AP) - NEWLY UPDATED!

Proteinase-activated receptor (PAR) is a unique member of the G protein-coupled receptor (GPCR) family that is activated primarily by proteases.

Peptide Toxins and Channel Blockers

A product brochure listing the peptide toxins and channel blockers available from Peptides International, conveniently grouped.

Poly Amino Acids and Collagen Peptides

Popular Polypeptides & Collagen-like Helical Model Peptides


PAIN RESEARCH: Synthetic Ion Channel Blocker ProTx-II

Rapamycin - NEW!

The product brochure for Rapamycin, or Sirolimus, a metabolite from the bacteria Streptomyces hygroscopicus

Research Exemption Peptides

These are FDA-regulated products. It is the responsibility of the customer to ensure that they are complying with Federal rules. Peptides International cannot be liable for infringement of rights made by the user.

Urotensin Peptides

Urotensin II (UII) is the most potent vasoconstrictor known to date.

Vasoactive Peptides

Many vasoactive peptides induce vasodilation by acting via specific G-protein coupled receptors (GPCR).

Enzyme Inhibitors

The product brochure list of the Enzyme Inhibitors and their characteristics

Enzyme Substrates

The product brochure list of the Enzyme Substrates and their characteristics