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MK-0557 is a selective and orally available antagonist of the neuropeptide Y5 receptor (Ki: 1.6 nM).

| Pack Size | Price | Availability | Quantity | 
|---|---|---|---|
| 1 mg | $30 | In Stock | |
| 5 mg | $65 | In Stock | |
| 10 mg | $98 | In Stock | |
| 25 mg | $178 | In Stock | |
| 50 mg | $293 | In Stock | |
| 100 mg | $413 | In Stock | |
| 200 mg | $575 | In Stock | |
| 1 mL x 10 mM (in DMSO) | $73 | In Stock | 
| Description | MK-0557 is a selective and orally available antagonist of the neuropeptide Y5 receptor (Ki: 1.6 nM). | 
| Targets&IC50 |  Y5 receptor:1.6 nM (Ki) | 
| In vitro | MK-0557 has a Ki=1.3 nM at the human NPY5R, with similar affinities at rhesus, mouse, and rat NPY5R. MK-0557 has no significant binding to the human NPY1R, NPY2R, NPY4R, or mouse NPY6R at concentrations of 10 μM [2]. | 
| In vivo | MK-0557 counteracts the NPY5R-selective agonist's influence on body-weight gain and hyperphagia in C57BL/6J mice, also markedly reducing body-weight gain in diet-induced obese (DIO) mice. A 40% reduction in body-weight gain is achieved by day 35 in lean mice shifted from regular chow to a medium high-fat diet (4.2 kcal/g), following treatment with MK-0557 at a dosage of 30 mg/kg PO QD[2]. | 
| Molecular Weight | 406.41 | 
| Formula | C22H19FN4O3 | 
| Cas No. | 328232-95-7 | 
| Smiles | Fc1ccccc1-n1ccc(NC(=O)[C@H]2CC[C@]3(CC2)OC(=O)c2ccncc32)n1 | 
| Relative Density. | 1.46 g/cm3 (Predicted) | 
| Color | White | 
| Appearance | Solid | 
| Storage | Powder: -20°C for 3 years | In solvent: -80°C for 1 year | Shipping with blue ice/Shipping at ambient temperature. | ||||||||||||||||||||||||||||||
| Solubility Information | DMSO: 25 mg/mL (61.51 mM), Sonication is recommended.  | ||||||||||||||||||||||||||||||
| Solution Preparation Table | |||||||||||||||||||||||||||||||
| DMSO 
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 For example, your dosage is 10 mg/kg Each animal weighs 20 g, and the dosage volume is 100 μL .
For example, your dosage is 10 mg/kg Each animal weighs 20 g, and the dosage volume is 100 μL .  A total of 10 animals were administered, and the formula you used is 5%
 A total of 10 animals were administered, and the formula you used is 5%  DMSO+30% PEG300+5% Tween 80+60% Saline/PBS/ddH2O. So your working solution concentration is 2 mg/mL。
DMSO+30% PEG300+5% Tween 80+60% Saline/PBS/ddH2O. So your working solution concentration is 2 mg/mL。 (mother liquor concentration of 40 mg/mL), if you need to configure a concentration that exceeds the solubility of the product, please contact us first.
 (mother liquor concentration of 40 mg/mL), if you need to configure a concentration that exceeds the solubility of the product, please contact us first. main solution, add 300 μLPEG300
 main solution, add 300 μLPEG300 mix well and clarify, then add 50 more μL Tween 80, mix well and clarify, then add 600 more μLSaline/PBS/ddH2O
 mix well and clarify, then add 50 more μL Tween 80, mix well and clarify, then add 600 more μLSaline/PBS/ddH2O mix well and clarify
 mix well and clarify
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