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Merck

L3022

Bouillon LB (Lennox)

Highly-referenced microbial growth powder medium, low salt, suitable for salt-sensitive E.coli culture.

Synonyme(s) :

Bouillon Luria Bertani, bouillon Lennox

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About This Item

NACRES:
NA.85
UNSPSC Code:
41106200

Nom du produit

Bouillon LB (Lennox), Highly-referenced microbial growth powder medium, low salt, suitable for salt-sensitive E.coli culture.

grade

Molecular Biology

sterility

non-sterile

form

powder

composition

NaCl, 5 g/L
Tryptone, 10 g/L
Yeast Extract, 5 g/L

technique(s)

microbiological culture: suitable

pH

6.8-7.2(2% solution)

application(s)

food and beverages
microbiology

storage temp.

room temp

suitability

nonselective for Escherichia coli
nonselective for coliforms

Quality Level

200

Catégories apparentées

Application

Ce produit convient à la culture non sélective de souches d'E. coli en vue d'un clonage, de la production de plasmides d'ADN ou de la fabrication de protéines recombinantes. Il convient également aux cultures sélectives avec ajout d'antibiotiques adaptés, y compris ceux nécessitant un environnement pauvre en sel comme la Zéocine®.
Le bouillon Luria est utilisé pour le maintien et la propagation d′Escherichia coli. La croissance d′E. coli est plus rapide dans le bouillon Luria, car celui-ci contient de la tryptone et des levures qui fournissent des facteurs de croissance essentiels à E. coli, lui évitant ainsi de les synthétiser. Le bouillon Luria comprend également des électrolytes essentiels au transport et à l′équilibre osmotique, grâce à la présence de NaCl.
Il a été utilisé pour remettre en suspension des fractions de cellules de T. pyriformis dans une étude du fractionnement d′extraits cellulaires de Trimastix.

Features and Benefits

Le bouillon LB Lennox en poudre offre :
  • Un conditionnement en petite quantité, pratique pour s′affranchir des pesées.
  • Une transposition facile à plus grande échelle, grâce à de plus gros conditionnements.
  • Une alternative économique au format liquide.
  • Une formulation standard.

General description

Le bouillon LB Lennox est un milieu de croissance microbienne de référence pour la culture d′E. coli. Ce milieu riche en nutriments contient des peptides, des acides aminés et des glucides dans une formulation à faible teneur en sels.

Preparation Note

1. Mettre 20 g en suspension dans 1 l d'eau distillée.
2. Stériliser par autoclavage pendant 15 minutes à 121 °C.
Pour préparer le bouillon LB de Lennox : ajouter 1 g de glucose, puis suivre les instructions de préparation indiquées plus haut.
Pour préparer le milieu d'Enquist et Sternberg : en conditions aseptiques, après autoclavage, ajouter 10 ml de sulfate de magnésium 1 M stérile.

Legal Information

Zeocin is a registered trademark of Cayla Sarl

Classe de stockage

11 - Combustible Solids

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)

Faites votre choix parmi les versions les plus récentes :

Certificats d'analyse (COA)

Lot/Batch Number
0000484723
0000484725
0000484723
0000484725
0000460881

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Retrouvez la documentation relative aux produits que vous avez récemment achetés dans la Bibliothèque de documents.

Consulter la Bibliothèque de documents

  1. Which document(s) contains shelf-life or expiration date information for a given product?

    If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.

  2. How do I get lot-specific information or a Certificate of Analysis?

    The lot specific COA document can be found by entering the lot number above under the "Documents" section.

  3. How do I find price and availability?

    There are several ways to find pricing and availability for our products. Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote.  USA customers:  1-800-325-3010 or view local office numbers.

  4. What is the Department of Transportation shipping information for this product?

    Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product. 

  5. What are the differences among the Luria, Lennox and Miller LB formulations?

    LB, (originally termed lysogeny broth) was initially composed of tryptone, yeast extract, NaCl and glucose.  Soon after, the glucose was omitted (Miller's version), and later the NaCl content lowered by half (Lennox's version).  For some applications, even lower salt is required (Luria's low salt version). 

  6. What is the difference among the many LB - Lennox products?

    LB - Lennox is available in many types to suit your needs.  The different product formats include powder, EZMix™ powder, and tablet form.  Each of these forms are available with and without agar for easy LB-agar plate preparation.L3022 (LB Lennox powder)L2897 (LB Lennox powder with agar)L7275 (LB Lennox tablets)L7025 (LB Lennox tablets with agar)L7658 (LB Lennox EZMix(TM) powder)L7533 (LB Lennox EZMix(TM) powder with agar)L5542 (LB Lennox pre-poured agar plates)

  7. Which bacterial culture medium is the best choice for my application?

    Each of the broths will likely grow E. coli very well, but there are still general guidelines for choosing a broth when you are working without a protocol. Generally:LB - Miller and LB - Lennox are used for E. coli growth and maintanence, DNA plasmid production and protein production.  The Lennox formulation has a lower salt content required for some salt-sensitive selection antibiotics.LB - Luria low salt is used for special applications where the E. coli growth or other constraints require the lowest possible salt content.Terrific Broth is used for higher yield protein production and high yield DNA plasmid production, because of the faster growth of the E. coli in this medium.SOB is used for protein production, DNA plasmid production and the generation of high-efficiency competent cells.SOC is used for initial growth of competent cells and the transformation procedure.

  8. Will adding magnesium to the culture medium increase cell density?

    In microbial broth formulations that do not already contain magnesium, the addition of 10-20 mM MgCl2 or MgSO4 may increase cell densities.  You may need to also increase the shaking speed of the incubator. 

  9. My question is not addressed here, how can I contact Technical Service for assistance?

    Ask a Scientist here.

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Antibiotics that interfere with translation, when combined, interact in diverse and difficult-to-predict ways. Here, we explain these interactions by "translation bottlenecks": points in the translation cycle where antibiotics block ribosomal progression. To elucidate the underlying mechanisms of drug interactions between
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Journal of dairy science, 100(3), 1780-1794 (2017-01-04)
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