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S Ellis

Publications and source records attributed to S Ellis.

At least 19 recordsLinked to original sources
PubMed1979

A costly mistake?

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Attitude of Health Personnel↗
PubMed1979

Who are we?

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Aggression↗
PubMed1979

A touch of guilt?

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Bangladesh↗
PubMed1979

Characterization of Azotobacter vinelandii deoxyribonucleic acid and folded chromosomes.

The properties of Azotobacter vinelandii deoxyribonucleic acid (DNA) and folded chromosomes were studied and compared to those of Escherichia coli as a standard. Based on melting temperature and buoyant density measurements, the guanosine + cytosine content of purified A. vinelandii DNA was 65%, whereas that of E. coli DNA was 50%. The results of renaturation studies showed that the unique DNA sequence lengths of the two organisms were similar with Cot1/2 values of 7.3 +/- 0.4 mol.s/liter and 7.5 +/- 0.3 mol.s/liter, respectively, for A. vinelandii and E. coli. Folded chromosomes of A. vinelandii sedimented in a centrifugal field at a rate identical to those derived from E. coli, 1,600 to 1,700S. Based on the DNA content per cell and the mass of a single genome, A. vinelandii contains at least 40 chromosomes per cell.

Azotobacter↗