On density of DNA

[Andrew Cockburn]

In article <3bl80f$1vn at obelix.cica.es>, bb1rofra at lucano (Antonio Rodriguez Franco) writes:
> I assume ethidium bromide increases the density of DNA. Is that is true,
> does anybody know what the density of DNA should be in the presence and in 
> the absence of EtBr ?.
> 
> Antonio R. Franco
> Cordoba (Spain)

Roughly 1.5 g/ml with EtBr, 1.7 g/ml without EtBr.  It will vary according
to lots of factors, such as G+C, supercoiling, EtBr concentration, etc.

Note EtBr decreases density of DNA.

Andrew Cockburn