SMILES:

CCC(C)C(NC(=O)CNC(=O)C(CC(O)=O)NC(=O)C(CO)NC(=O)C(N)CC1=CN=C[NH]1)C(=O)NC(CC2=CC=CC=C2)C(=O)NC(C(C)O)C(=O)NC(CC(O)=O)C(=O)NC(CO)C(=O)NC(CC3=CC=C(O)C=C3)C(=O)NC(CO)C(=O)NC(CCCNC(N)=N)C(=O)NC(CC4=CC=C(O)C=C4)C(=O)NC(CCCNC(N)=N)C(=O)NC(CCCCN)C(=O)NC(CCC(N)=O)C(=O)NC(CCSC)C(=O)NC(C)C(=O)NC(C(C)C)C(=O)NC(CCCCN)C(=O)NC(CCCCN)C(=O)C(=O)C(CC5=CC=C(O)C=C5)NC(=O)C(CC(C)C)NC(=O)C(C)NC(=O)C(C)NC(=O)C(NC(=O)C(CC(C)C)NC(=O)CNC(=O)C(CCCCN)NC(=O)C(CCCNC(N)=N)NC(=O)C(CC6=CC=C(O)C=C6)NC(=O)C(CCCCN)NC(=O)C(CCC(N)=O)NC(=O)C(CCCNC(N)=N)NC(=O)C(NC(=O)C(CCCCN)NC(=O)C(CC(N)=O)NC(=O)C(CCCCN)NN)C(C)C)C(C)C
PACAP 1-38 Chemical Structure
Chemical Structure
Check the PACAP 1-38 product page for in-depth specifications, including solubility, stock solutions, MOA, and working concentrations.

Chemical Information

IUPAC Name (3S)-4-[[2-[[(2S,3S)-1-[[(2S)-1-[[(2S,3R)-1-[[(2S)-1-[[(2S)-1-[[(2S)-1-[[(2S)-1-[[(2S)-1-[[(2S)-1-[[(2S)-1-[[(2S)-6-amino-1-[[(2S)-5-amino-1-[[(2S)-1-[[(2S)-1-[[(2S)-1-[[(2S)-6-amino-1-[[(2S)-6-amino-1-[[(2S)-1-[[(2S)-1-[[(2S)-1-[[(2S)-1-[[(2S)-1-[[(2S)-1-[[2-[[(2S)-6-amino-1-[[2-[[(2S)-1-[[(2S)-6-amino-1-[[(2S)-5-amino-1-[[(2S)-1-[[(2S)-1-[[(2S)-6-amino-1-[[(2S)-4-amino-1-[[(2S)-1,6-diamino-1-oxohexan-2-yl]amino]-1,4-dioxobutan-2-yl]amino]-1-oxohexan-2-yl]amino]-3-methyl-1-oxobutan-2-yl]amino]-5-carbamimidamido-1-oxopentan-2-yl]amino]-1,5-dioxopentan-2-yl]amino]-1-oxohexan-2-yl]amino]-3-(4-hydroxyphenyl)-1-oxopropan-2-yl]amino]-2-oxoethyl]amino]-1-oxohexan-2-yl]amino]-2-oxoethyl]amino]-4-methyl-1-oxopentan-2-yl]amino]-3-methyl-1-oxobutan-2-yl]amino]-1-oxopropan-2-yl]amino]-1-oxopropan-2-yl]amino]-4-methyl-1-oxopentan-2-yl]amino]-3-(4-hydroxyphenyl)-1-oxopropan-2-yl]amino]-1-oxohexan-2-yl]amino]-1-oxohexan-2-yl]amino]-3-methyl-1-oxobutan-2-yl]amino]-1-oxopropan-2-yl]amino]-4-methylsulfanyl-1-oxobutan-2-yl]amino]-1,5-dioxopentan-2-yl]amino]-1-oxohexan-2-yl]amino]-5-carbamimidamido-1-oxopentan-2-yl]amino]-3-(4-hydroxyphenyl)-1-oxopropan-2-yl]amino]-5-carbamimidamido-1-oxopentan-2-yl]amino]-3-hydroxy-1-oxopropan-2-yl]amino]-3-(4-hydroxyphenyl)-1-oxopropan-2-yl]amino]-3-hydroxy-1-oxopropan-2-yl]amino]-3-carboxy-1-oxopropan-2-yl]amino]-3-hydroxy-1-oxobutan-2-yl]amino]-1-oxo-3-phenylpropan-2-yl]amino]-3-methyl-1-oxopentan-2-yl]amino]-2-oxoethyl]amino]-3-[[(2S)-2-[[(2S)-2-amino-3-(1H-imidazol-5-yl)propanoyl]amino]-3-hydroxypropanoyl]amino]-4-oxobutanoic acid
CAS Number 137061-48-4
Molecular Formula

C203H331N63O53S
Molecular Weight (MW) 4534.26
SMILES CCC(C)C(NC(=O)CNC(=O)C(CC(O)=O)NC(=O)C(CO)NC(=O)C(N)CC1=CN=C[NH]1)C(=O)NC(CC2=CC=CC=C2)C(=O)NC(C(C)O)C(=O)NC(CC(O)=O)C(=O)NC(CO)C(=O)NC(CC3=CC=C(O)C=C3)C(=O)NC(CO)C(=O)NC(CCCNC(N)=N)C(=O)NC(CC4=CC=C(O)C=C4)C(=O)NC(CCCNC(N)=N)C(=O)NC(CCCCN)C(=O)NC(CCC(N)=O)C(=O)NC(CCSC)C(=O)NC(C)C(=O)NC(C(C)C)C(=O)NC(CCCCN)C(=O)NC(CCCCN)C(=O)C(=O)C(CC5=CC=C(O)C=C5)NC(=O)C(CC(C)C)NC(=O)C(C)NC(=O)C(C)NC(=O)C(NC(=O)C(CC(C)C)NC(=O)CNC(=O)C(CCCCN)NC(=O)C(CCCNC(N)=N)NC(=O)C(CC6=CC=C(O)C=C6)NC(=O)C(CCCCN)NC(=O)C(CCC(N)=O)NC(=O)C(CCCNC(N)=N)NC(=O)C(NC(=O)C(CCCCN)NC(=O)C(CC(N)=O)NC(=O)C(CCCCN)NN)C(C)C)C(C)C
InChIKey SIOKKMOWMDCVKB-RGBLINGASA-N

How to Prepare Stock Solution?

Concentration Volume Mass
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Solubility

Batch:
All in vitro solubility values are batch-tested experimental data (non-literature values).
Solvent Solubility & Note
Water 100 mg/mL
FAQ
Q: Why does a DMSO stock precipitate in media/saline?
A: It is caused by unheated aqueous media (supersaturation), local solvent shock, or incorrect mixing sequence.
How to fix it?
  • Preheat media/saline to 37°C.
  • Mix rapidly (pipette/vortex) upon addition.
  • For complex mixes, always add the aqueous phase last.
  • Re-dissolve minor precipitates with a 37°C water bath and sonication (≤30 min).

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Note: Technical data last updated: Sep 1, 2026.