Deoxyribonucleic Acid Similarities among Pseudomonas Species

Deoxyribonucleic acid similarity experiments in which the S1 nuclease methodology was used were performed on strains of Pseudomonas species, including some that had not been previously subjected to similarity measurements. The results obtained with this technique confirmed and expanded previous observations on the low levels of deoxyribonucleic acid similarity among species of the genus as determined by membrane competition experiments. A general discussion of the results and nomenclatural status of some of the species is included.