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=Difco Nutrient Agar (DNA)=
=Difco Nutrient Broth (DNB)=


Difco Nutrient Agar is a rich medium commercially available from BD and routinely used for cultivating many non-fastidious organisms. It contains beef extract and peptones; exact composition will vary between batches.
Difco Nutrient Broth is a rich medium commercially available from BD and routinely used for cultivating many non-fastidious organisms. It contains beef extract and peptones; exact composition will vary between batches.


Many Streptomyces sp. grow well on DNA, but developmental and/or antibiotic production phenotypes may differ compared to growth on other media (e.g. [[SFM]]).


==Preparation==
==Preparation==
Per Litre:
Per Litre:
*4g Difco Nutrient Broth Powder
*4g Difco Nutrient Broth Powder
*10g Agar
*1L dH2O  
*1L dH2O  


'''Instructions'''
'''Instructions'''
#For solid medium, add 0.8g of DNB powder into each 250ml conical flask
#Add DNB powder to dH2O and mix to dissolve
#Add 2g of Agar
#Add 200ml dH2O
#Autoclave
#Autoclave


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==Notes==
==Notes==
For growth in liquid culture, [[Difco Nutrient Broth]] can be made without the agar.
According to the recipe in Practical Streptomyces Genetics, it should be 8 g DNB per litre.


==References==
==References==

Revision as of 15:02, 25 June 2019

Difco Nutrient Broth (DNB)

Difco Nutrient Broth is a rich medium commercially available from BD and routinely used for cultivating many non-fastidious organisms. It contains beef extract and peptones; exact composition will vary between batches.


Preparation

Per Litre:

  • 4g Difco Nutrient Broth Powder
  • 1L dH2O

Instructions

  1. Add DNB powder to dH2O and mix to dissolve
  2. Autoclave


Uses

Notes

According to the recipe in Practical Streptomyces Genetics, it should be 8 g DNB per litre.

References