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LIBDL-RO

Roche

Liberase DL Research Grade

low Dispase concentration

Autenticatiper visualizzare i prezzi riservati alla tua organizzazione & contrattuali


About This Item

Codice UNSPSC:
12352200

Forma fisica

lyophilized

Confezionamento

pkg of 100 mg (05466202001 [2 x 50 mg])
pkg of 10 mg (05401160001 [2 x 5 mg])

Produttore/marchio commerciale

Roche

Parametri

35-37 °C optimum reaction temp.

pH ottimale

7.4

Condizioni di spedizione

dry ice

Temperatura di conservazione

−20°C

Descrizione generale

Liberase DH Research Grade contains highly purified Collagenase I and Collagenase II. These two collagenase isoforms are blended in a precise ratio to each other, and with a high concentration of Dispase®, a non-clostridial neutral protease. Liberase DL (Dispase Low) Research Grade is used for the dissociation of a broad range of tissue types, where high purity of the enzyme blend is necessary for high cell yield and viability. Bacterial by-products, such as endotoxins, are reduced up to several thousand-fold.

Applicazioni

Liberase® DL (Dispase Low) Research Grade has been used for the isolation of skin stem cells from mice. It is also used for the dissociation of a broad range of tissue types, where high purity of the enzyme blend is necessary for high cell yield and viability. Bacterial by-products, such as endotoxins, are reduced up to several thousand-fold.

Caratteristiche e vantaggi

  • Maximize viability and yield of isolated cells with an enzyme blend that has less clostripain and trypsin activity, as well as reduced endotoxin content.
  • Count on higher specific activity of the enzyme blend as a result of higher Collagenase I + II purity (determined by HPLC analysis).
  • Obtain higher experimental reproducibility due to higher lot-to-lot consistency.

Nota sulla preparazione

Stabilizers: Calcium
Working concentration: Liberase Research Grade Enzyme Working Concentration

Liberase enzymes have significantly higher specific activities than traditional collagenases. This means that the working concentration of Liberase Research Grade Purified Enzymes, expressed in mg/ml, will be lower than that of traditional collagenase.

When the application is on the Roche list of applications at www.collagenase.com, use the Liberase Research Grade concentration recommended for that application.

When the application is not included on this list, first use Liberase TM Research Grade at a concentration of 0.08–0.28 Wünsch units/ml.

The goal is to determine the best starting concentration of Liberase Research Grade Enzyme Blends. This is a starting point, and the final concentration may vary due to differences in procedure and lot-to-lot differences in traditional collagenase.

Collagenase Working Concentration

Multiply your previous collagenase working concentration (mg/ml) by its specific activity (Wünsch units/mg, [as determined above]), to obtain Wünsch units/ml. To determine how much Liberase Research Grade Enzyme Blend to use, first multiply your collagenase working concentration (in Wünsch units/ml) times the total volume of your working enzyme solution to obtain the total collagenase activity needed (Wünsch units). Divide the total collagenase activity required by the Liberase Research Grade stock concentration ( “Reconstitution and Storage”). This indicates how many milliliters of Liberase Research Grade Enzyme Blend stock solution to use in your working enzyme solution.
Storage conditions (working solution): Store unused stock solution in single-use aliquots at -15 to -25 °C. For further information on product stability, please visit the Roche Liberase Enzyme website at www.collagenase.com.

Note: Avoid repeated freezing and thawing!

Ricostituzione

Reconstitute the lyophilized enzyme with injection-quality sterile water or tissue-dissociation buffer. Do not add serum or other components that may influence enzyme activity, such as albumin or protease inhibitors, to the dissociation buffer. Enzyme stability is reduced at higher concentrations and warmer temperatures (4 °C). Avoid both the above conditions.

Reconstitute the entire vial. Do not weigh individual aliquots of the lyophilizate. The introduction of moisture into the vial results in a decline in enzymatic activity.

Place vial on ice to rehydrate the lyophilized enzyme.

Gently agitate the vial at 2 to 8 °C until enzyme is completely dissolved (max. 30 min).

Depending on the type of tissue-dissociation buffer used to dissolve Liberase Research Grade Purified Enzyme Blends, slight precipitations may be observed readily dissolve in the diluted working solution and have no influence on enzyme activity.

Remove an aliquot of the stock solution to prepare the working solution.

Reconstitution volume

2 ml (1 vial with 5 mg–10 mg pack size)
10 ml (1 vial with 50 mg–100 mg pack size)

Collagenase Wünsch (units/ml)

13 (1 vial with 5 mg–10 mg pack size)
26 (1 vial with 50 mg–100 mg pack size)

Total Collagenase concentration [mg/ml]

2.5 (1 vial with 5 mg–10 mg pack size)
5.0 (1 vial with 50 mg–100 mg pack size)

Altre note

For life science research only. Not for use in diagnostic procedures.

Note legali

Dispase is a registered trademark of Godo Shusei Co., Ltd.
Liberase is a trademark of Roche
Roche is a registered trademark of Roche Molecular Systems, Inc.

Pittogrammi

Exclamation markHealth hazard

Avvertenze

Danger

Indicazioni di pericolo

Classi di pericolo

Eye Irrit. 2 - Resp. Sens. 1 - Skin Irrit. 2 - STOT SE 3

Organi bersaglio

Respiratory system

Codice della classe di stoccaggio

11 - Combustible Solids

Classe di pericolosità dell'acqua (WGK)

WGK 1

Punto d’infiammabilità (°C)

does not flash


Certificati d'analisi (COA)

Cerca il Certificati d'analisi (COA) digitando il numero di lotto/batch corrispondente. I numeri di lotto o di batch sono stampati sull'etichetta dei prodotti dopo la parola ‘Lotto’ o ‘Batch’.

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Sigma-Aldrich

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Articoli

Enzyme Explorer Key Resource: Collagenase Guide.Collagenases, enzymes that break down the native collagen that holds animal tissues together, are made by a variety of microorganisms and by many different animal cells.

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