Deoxyribonucleic acid-mediated transformation of Spirillum lipoferum.

The nitrogenase system of Spirillum lipoferum.

The nitrogenase system of Spirillum lipoferum was separated into three components, the normal Mo-Fe and Fe proteins as well as an activating factor for the Fe protein. The rate of activation is increased by Mn2+ or by an excess of Mg2+, and the process requires ATP.

Base composition of deoxyribonucleic acid from Spirillum volutans, S. serpens and S. itersonii.

Inhibition of transformation of Bacillus subtilis by heavy metals.

Mercuric ions, as well as organomercuric ions and cadmium ions, can inhibit deoxyribonucleic acid-mediated transformation in Bacillus subtilis 168 without decreasing the viability of the total population. Differences in the inhibition of transformation by mercuric ions are identifiable on a temporal and concentration dependence basis. Sensitivity to low concentrations (9.2 x 10(-8) M) appears e...

Transformation of Escherichia coli by chromosomal deoxyribonucleic acid from Salmonella typhi.

The genetic transformation of Escherichia coli K-12 with chromosomal deoxyribonucleic acid purified from Salmonella typhi is described.

Transformation in Bacillus amyloliquefaciens.

The methodology and some of the requirements for the deoxyribonucleic acid-mediated transformation of an arginine auxotroph of Bacillus amyloliquefaciens to prototrophy are described.