“…We found that all gram-negative eubacteria of the families Enterobacteriaceae, Parvobacteriaceae, and Vibrionaceae tested are Dam'. Previously, the Dam' phenotype has been reported in other Proteus and Vibrio species, as well as in the related genera Haemophilus, Enterobacter, Escherichia, Erwinia, Klebsiella, Providencia, Salmonella, and Serratia (3,11,33). We found that the five cyanobacteria tested were Darm'.…”