PE 22-28 Testing
MW: ~830 g/mol
Shortened spadin analog blocking TREK-1 potassium channels; depression research.
What we test on PE 22-28
Confirm sequence by MS.
Standard Cognitive / Nootropic Panel
- ✓RP-HPLC purity
- ✓LC-MS/MS identity (modification confirmation)
- ✓Residual solvents
Common impurities in this category
Missing N-acetyl group, free vs. amidated C-terminus, sequence truncation.
Related Cognitive / Nootropic peptides
Dihexa
456.62 g/mol
Small-molecule angiotensin IV analog; potent neurotrophic compound.
DSIP (Delta Sleep-Inducing Peptide)
848.81 g/mol
Nonapeptide originally isolated from rabbit cerebral venous blood; sleep research.
Noopept
318.37 g/mol
Synthetic dipeptide derivative; widely studied as a nootropic.
P21 Peptide
~2200 g/mol
Synthetic peptide derived from CNTF; neurogenic research compound.
Selank / NA-Selank / NA-Selank-Amidate
751.88 g/mol
Heptapeptide based on tuftsin; Russian-developed anxiolytic research peptide. Available as plain, N-acetyl, and amidated variants.
Semax / NA-Semax / NA-Semax-Amidate
813.94 g/mol
Heptapeptide based on the ACTH(4-10) fragment; cognitive research compound.