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. Author manuscript; available in PMC: 2013 May 13.
Published in final edited form as: Methods Mol Biol. 2011;720:3–35. doi: 10.1007/978-1-61779-034-8_1

Fig 1.

Fig 1

Structures of some naturally occurring polyamines. It should be noted that at physiological pH values the nitrogen atoms in these structures (and in subsequent figures) would be predominantly protonated (see Chapter 32). Additional polyamines found in thermophiles are described in Chapter 5.