2. GPCR/G Protein Neuronal Signaling
  3. Opioid Receptor
  4. CTAP

CTAP is a potent, highly selective, and BBB penetrant μ opioid receptor antagonist, with an IC50 of 3.5 nM. CTAP displays over 1200-fold selectivity over δ opioid (IC50=4500 nM) and somatostatin receptors. CTAP can be used for the study of L-DOPA-induced dyskinesia (LID) and opiate overdose or addiction.

For research use only. We do not sell to patients.

Custom Peptide Synthesis

CTAP

CTAP Chemical Structure

CAS No. : 103429-32-9

Size Price Stock Quantity
1 mg In-stock
5 mg In-stock
10 mg In-stock
50 mg   Get quote  
100 mg   Get quote  

* Please select Quantity before adding items.

This product is a controlled substance and not for sale in your territory.

Customer Review

Based on 2 publication(s) in Google Scholar

Other Forms of CTAP:

CTAP Related Antibodies

Top Publications Citing Use of Products

View All Opioid Receptor Isoform Specific Products:

View All Isoforms
μ Opioid Receptor/MOR κ Opioid Receptor/KOR δ Opioid Receptor/DOR NOP Receptor/ORL1

  • Biological Activity

  • Purity & Documentation

  • References

  • Customer Review

Description

CTAP is a potent, highly selective, and BBB penetrant μ opioid receptor antagonist, with an IC50 of 3.5 nM. CTAP displays over 1200-fold selectivity over δ opioid (IC50=4500 nM) and somatostatin receptors. CTAP can be used for the study of L-DOPA-induced dyskinesia (LID) and opiate overdose or addiction[1][2].

IC50 & Target

μ Opioid Receptor/MOR

3.5 nM (IC50)

δ Opioid Receptor/DOR

4500 nM (IC50)

In Vivo

CTAP (0-1 mg/kg, IP, single) blocks morphine’s antinociceptive effect[1].
CTAP (10 mg/kg; IP, single) has no effect on L-DOPA-induced limb, axial, orolingual, or locomotor abnormal involuntary movements[1].
CTAP is stable in the blood and serum of rats (T1/2 > 500 min), showing that the structure of this peptide offers enzymatic resistance[2].
CTAP is extensively protein-bound to albumin in the perfusion medium (68.2%) and to proteins in rat serum (84.2%)[2].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

Animal Model: Male Sprague-Dawley rats[1]
Dosage: 0, 0.1, 0.5, 1 mg/kg
Administration: IP, single
Result: Completely blocked morphine’s antinociceptive effect at 0.5 or 1 mg/kg.
Molecular Weight

1104.30

Formula

C51H69N13O11S2
CAS No.
Appearance

Solid

Color

White to off-white

Sequence

{d-Phe}-Cys-Tyr-{d-Trp}-Arg-Thr-{Pen}-Thr-NH2 (Disulfide bridge:Cys2-Pen7)
Sequence Shortening

{d-Phe}-CY-{d-Trp}-RT-{Pen}-T-NH2 (Disulfide bridge:Cys2-Pen7)
Shipping

Room temperature in continental US; may vary elsewhere.
Storage

Sealed storage, away from moisture

Powder -80°C 2 years
-20°C 1 year

*In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture)

Solvent & Solubility
In Vitro: 

H2O : 1.67 mg/mL (1.51 mM; Need ultrasonic)

Preparing
Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 0.9056 mL 4.5278 mL 9.0555 mL
5 mM --- --- ---
View the Complete Stock Solution Preparation Table

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

* Note: If you choose water as the stock solution, please dilute it to the working solution, then filter and sterilize it with a 0.22 μm filter before use.

  • Molarity Calculator

  • Dilution Calculator

Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

Mass
=
Concentration
×
Volume
×
Molecular Weight *

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

Concentration (start)

C1

×
Volume (start)

V1

=
Concentration (final)

C2

×
Volume (final)

V2

In Vivo Dissolution Calculator
Please enter the basic information of animal experiments:

Dosage

mg/kg

Animal weight
(per animal)

g

Dosing volume
(per animal)

μL

Number of animals

Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.
Calculation results:
Working solution concentration: mg/mL
The concentration of the stock solution you require exceeds the measured solubility. The following solution is for reference only.If necessary, please contact MedChemExpress (MCE).
Purity & Documentation
References

Complete Stock Solution Preparation Table

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

Optional Solvent Concentration Solvent Mass 1 mg 5 mg 10 mg 25 mg
H2O 1 mM 0.9056 mL 4.5278 mL 9.0555 mL 22.6388 mL

* Note: If you choose water as the stock solution, please dilute it to the working solution, then filter and sterilize it with a 0.22 μm filter before use.

  • No file chosen (Maximum size is: 1024 Kb)
  • If you have published this work, please enter the PubMed ID.
  • Your name will appear on the site.

CTAP Related Classifications

Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

Keywords:

CTAP103429-32-9Opioid Receptorsomatostatin receptorμ-opioid ReceptorL-DOPADyskinesiaParkinson’s diseasePDInhibitorinhibitorinhibit

Your Recently Viewed Products:

Inquiry Online

Your information is safe with us. * Required Fields.

Product Name

  

Requested Quantity *

Applicant Name *

 

Salutation

Email Address *

 

Phone Number *

Department

 

Organization Name *

City

State

Country or Region *

      

Remarks

Bulk Inquiry

Inquiry Information

Product Name:
CTAP
Cat. No.:
HY-P1335
Quantity:
MCE Japan Authorized Agent:

Customer Review

Thank You for Your Feedback!

Request for HNMR Report

Please fill out this form to request the QC report. We will send it to your Email address shortly.

Your information is safe with us. * Required Fields.

Product Name

  

Lot #

Applicant Name *

 

Email Address *

Phone Number

 

Department *

Organization Name *

 

Country or Region *

Remarks

SAFETY DATA SHEET (SDS)

English - EN (252 KB) Français - FR (252 KB) Deutsch - DE (252 KB) Norwegian - NO (252 KB) Español - ES (252 KB) Swedish - SV (252 KB) Italian - IT (252 KB) Korean - KR (252 KB) Portuguese - PT (252 KB)

Request for HNMR Report

We have received your request and will respond to you as soon as possible.