Appendix C 
Guanine-Cytosine Contents in Bacterial DNA* 
Genus 
Escherichia species 
Citrobacter species 
Salmonella species 
Shigella species 
Klebsiella species 
Enterobacter species 
Serratia species 
Erwinia species 
Pseudomonas species 
Rhizobium species 
Acinetobacter calcoaceticus 
Agrobacterium tumefaciens 
Rhodopseudomonas sphaeroides 
Range of G-C Contents (percent) 
50-52 
52- 53 
50-54 
50-52 
53- 60 
55-58 
53-60 
50-57 
48-69 
58- 65 
42-43 
59- 62 
^71 
* The guanine-cytosine contents are taken from Handbook of Microbiology (Vol. II, 
p.585-691) and the ranges for species within each genus are based on those species 
designated as belonging to that genus in Bergey's Manual of Determinative Bacterio- 
logy (8th edition). 
[A-322] 
