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Title: Assume that a strain of E. coli is grown for many generations in 15N (present in Post by: fitry on Nov 29, 2014 Assume that a strain of E. coli is grown for many generations in 15N (present in the
ammonium ion), a heavy isotope of nitrogen (14N). Under this condition, assume that the DNA has a density of 1.723 gm/cm3 (with water being 1.00 gm/cm3). Assume that DNA containing only the common form, 14N, has a density of 1.700. Bacteria from the 15N culture were washed in buffer and transferred to 14N medium for one generation. DNA was extracted. thanks Title: Re: Assume that a strain of E. coli is grown for many generations in 15N (present in Post by: bio_man on Nov 29, 2014 No question was asked here, though I found something helpful:
[Solved] Assume that a culture of E. coli was grown for approximately 50 generations in 1 (https://biology-forums.com/index.php?topic=86059.0) |