mass of bacteria

Duncan Clark junk at
Tue Apr 9 04:36:58 EST 2002

Historians believe that in newspost <a8sofb$eip$1 at> 
on Mon, 8 Apr 2002, Graham Shepherd <muhero.nospam at> 
penned the following literary masterpiece:
>So the dry weight is 0.29 picograms - if wet weight is about double the dry
>weight that makes it 0.6 picograms. My original very crude estimate was 0.2
>picograms. Do Neidhardt et al also publish average dimensions and density?
>If so, we can recalculate using a formula for a cylinder with hemispherical
>ends and see how close a derived weight is to a measured value.

 From back of an NEB catalogue for E.coli or Salmonella typhimurium

Dry weight      2.8 x 10E-13g
Wet weight      9.5 x 10E-13g
Total protein   1.55 x 10E-13g
Volume  1.15um^3
Protein concn in cell 135mg/ml

The problem with being on the cutting edge is that you occasionally get
sliced from time to time....

Duncan Clark
GeneSys Ltd.

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