Journal
SCIENTIFIC REPORTS
Volume 6, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/srep38828
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Funding
- BBSRC CBMNet grant
- UK Research Councils Synthetic Biology for Growth
- Synthetic Biology Research Centre
- BBSRC iCASE grant
- Biotechnology and Biological Sciences Research Council [1602789, BB/M018040/1] Funding Source: researchfish
- BBSRC [BB/M018040/1, 1602789] Funding Source: UKRI
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Optical density (OD) measurements of microbial growth are one of the most common techniques used in microbiology, with applications ranging from studies of antibiotic efficacy to investigations of growth under different nutritional or stress environments, to characterization of different mutant strains, including those harbouring synthetic circuits. OD measurements are performed under the assumption that the OD value obtained is proportional to the cell number, i.e. the concentration of the sample. However, the assumption holds true in a limited range of conditions, and calibration techniques that determine that range are currently missing. Here we present a set of calibration procedures and considerations that are necessary to successfully estimate the cell concentration from OD measurements.
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