1. Adams E, Frank L (1980) Metabolism of proline and the hydroxyprolines. Annu Rev Biochem 49:1005–1061
2. Ausubel FM, Brent R, Kingston RE, Moore DD, Smith JA, Seidman JG, Struhl K (1987) Current Protocols in Molecular Biology. Green/Wiley Interscience, New York, p 1.1.2
3. Bachmann BJ (1987) Linkage map of Escherichia coli K-12, edition 7. In: Neidhardt FC, Ingraham JL, Low KB, Magasanik B, Schaechter M, Umbarger HE (eds) Escherichia coli and Salmonella typhimurium Cellular and Molecular Biology. American Society for Microbiology, Washington, DC, pp 807–876
4. Bernard T, Pocard J-A, Perroud B, LeRudulier D (1982) Variations in response of salt-stressed Rhizobium strains to betaines. Arch Microbiol 143:359–364
5. Csonka LN (1989) Physiological and genetic responses of bacteria to osmotic stress. Microbiol Rev 53:121–147