The Product Information sheet of product "P5318" suggests that this grade of Pepstatin A may not be soluble, even at low levels of alcohol or DMSO, unless 10% acetic acid is added. It seems that the purer the material, the less soluble it becomes in ethanol, methanol, or DMSO. In contrast, the less pure material P4265 is highly soluble in any of the solvents mentioned at 25mg/mL. Therefore, it is advisable to add some acetic acid, either by titrating it or adding it directly to 10% acetic acid/ethanol to dissolve this inhibitor.
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| Größe/SKU | Verfügbarkeit | Preis |
|---|---|---|
5 mg | Ab HEUTE lieferbarvonSchnelldorf | € 128,00 |
25 mg | Ab HEUTE lieferbarvonSchnelldorf | € 444,00 |
Über diesen Artikel
€ 128,00
Ab HEUTE lieferbarDetails
Produktname
Pepstatin A, microbial, Purity ≥98%
biological source
microbial
Quality Segment
form
powder
input
general use sample(s)
mp
233 °C (dec.) (lit.)
solubility
0.8-1.2 mg/mL (1% AcOH in Methanol (mix well))
storage temp.
2-8°C
SMILES string
CC(C)C[C@H](NC(=O)[C@H](C)NC(=O)C[C@H](O)[C@H](CC(C)C)NC(=O)[C@@H](NC(=O)[C@@H](NC(=O)CC(C)C)C(C)C)C(C)C)[C@@H](O)CC(O)=O
InChI
1S/C34H63N5O9/c1-17(2)12-23(37-33(47)31(21(9)10)39-34(48)30(20(7)8)38-27(42)14-19(5)6)25(40)15-28(43)35-22(11)32(46)36-24(13-18(3)4)26(41)16-29(44)45/h17-26,30-31,40-41H,12-16H2,1-11H3,(H,35,43)(H,36,46)(H,37,47)(H,38,42)(H,39,48)(H,44,45)/t22-,23-,24-,25-,26-,30-,31-/m0/s1
InChI key
FAXGPCHRFPCXOO-LXTPJMTPSA-N
General description
Application
Biochem/physiol Actions
Preparation Note
Stammlösungen mit einer Konzentration von 1 mg/ml sind bei 4 °C mindestens eine Woche lang stabil. Eine 1-mM-Lösung in Methanol oder DMSO ist bei -20 °C monatelang stabil. Wenn Lösungen einen dunkleren Gelbton annehmen, findet eine Hydrolyse des Reagenz statt.
Eine Arbeitskonzentration von 1 μM ist bei Raumtemperatur mindestens einen Tag lang stabil.
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Dieser Artikel | |||
|---|---|---|---|
| description microbial, Purity ≥98% | description ≥100,000 U/mg | description microbial, ≥75% (HPLC) | description Pepstatin A is an inhibitor of aspartic proteinases such as pepsin, cathepsins D and E |
| biological source microbial | biological source Streptomyces sp. | biological source microbial | biological source - |
| Quality Level 200 | Quality Level 100 | Quality Level 300 | Quality Level 100 |
| form powder | form powder | form powder | form - |
| storage temp. 2-8°C | storage temp. 2-8°C | storage temp. 2-8°C | storage temp. - |
| solubility 0.8-1.2 mg/mL (1% AcOH in Methanol (mix well)) | solubility ethanol: soluble 1 mg/mL | solubility ethanol: acetic acid (9:1): 1 mg/mL, clear to hazy, colorless | solubility - |
| mp 233 °C (dec.) (lit.) | mp 233 °C (dec.) (lit.) | mp 233 °C (dec.) (lit.) | mp - |
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Lagerklasse
11 - Combustible Solids
Flammpunkt (°F)
Not applicable
Flammpunkt (°C)
Not applicable
PSA (Persönliche Schutzausrüstung)
Eyeshields, Gloves, type N95 (US)
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Is the recommended solution preparation for Pepstatin A product P5318 (CAS 26305-03-3) similar for DMSO solubility as it is for ethanol and methanol with 10% (v/v) acetic acid added?
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