Understanding Final Volume at Recovery in Transformation Efficiency Calculation

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SUMMARY

The discussion centers on the calculation of Transformation Efficiency (TE) using the formula (# of transformants)/(g of DNA) * (Final volume at recovery) / (Volume plated). The term "final volume at recovery" refers to the total volume of the mixed components, including pGal DNA, X-gal, and recovery broth. Participants emphasize the importance of accurately determining whether the entire transformation volume was plated or only a portion, as this affects the TE calculation.

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  • Understanding of Transformation Efficiency (TE) calculations
  • Familiarity with molecular biology concepts such as transformants and DNA concentration
  • Knowledge of components used in bacterial transformation, including pGal DNA and X-gal
  • Experience with plating techniques in microbiology
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Molecular biologists, microbiologists, and laboratory technicians involved in bacterial transformation experiments and those seeking to improve their understanding of Transformation Efficiency calculations.

Josh123
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I know that the formula to calculate the TE is

(#of transformants)/(g of DNA) * (Final volume at recovery) / (Volume plated)

but what exactly is "fianl volume at recovery"? Do I calculate the total # of pGal DNA, X-gal and recovery broth that I mixed up?
 
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You need that to calculate what the fraction was that you plated. Did you plate all your transformation volume, or did you only plate part of it?
 

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