Cosmetic Science

Argireline

Acetyl hexapeptide-8

6 residues · 889 Da · 121 atoms

Six residues capped with an acetyl group at one end and an amide at the other, both of which are drawn. Modelled on the N-terminal end of a much larger protein involved in vesicle docking.

Reference entry · not stocked

GHK

Gly-His-Lys, without the copper

3 residues · 340 Da · 49 atoms

The bare tripeptide, shown without the copper it usually carries. Comparing it with GHK-Cu in this library shows exactly what the metal adds and where it sits.

Reference entry · not stocked

GHK-Cu

Copper tripeptide (Gly-His-Lys)

3 residues · 404 Da · 50 atoms

A tripeptide present in human plasma that binds copper(II) with high affinity. The copper is shown chelated by the terminal amine, the backbone amide nitrogen and the histidine imidazole - the metal position was relaxed to sit about 2 A from each donor.

In our catalogue

Hexapeptide-11

6 residues · 677 Da · 97 atoms

Six residues, two prolines and two phenylalanines. The prolines force an extended backbone, so it is modelled in a polyproline-II conformation.

Reference entry · not stocked

Matrixyl core

5 residues · 564 Da · 86 atoms

The five-residue core of palmitoyl pentapeptide-4, a fragment of type I collagen. The palmitoyl chain that the cosmetic form carries is a lipid tail and is not drawn, so the mass shown is the peptide alone.

Reference entry · not stocked

Oligopeptide-68

4 residues · 397 Da · 56 atoms

Four residues, GHK extended at the other end instead. Three variations on the same tripeptide core are now here.

Reference entry · not stocked

SNAP-8

Acetyl octapeptide-3

8 residues · 1075 Da · 143 atoms

Argireline with two more residues on the end, and otherwise the same molecule. Worth seeing beside it: the entire difference is an alanine and an aspartate.

Reference entry · not stocked

Tetrapeptide-3

4 residues · 469 Da · 71 atoms

Four residues. The GHK tripeptide with a lysine added to the front, and both are in the library so the addition is visible.

Reference entry · not stocked