Oshima T
J Biol Chem. 1982 Sep 10;257(17):9913-4.
A pentaamine was found in cells of an extreme thermophile, Thermus thermophilus, grown at 80 degrees C. The chemical structure was determined to be 1,15-diamino-4,8,12-triazapentadecane, NH2(CH2)3NH(CH2)3NH(CH2)3NH(CH2)3NH2. A trivial name "caldopentamine" is proposed for the new naturally occurring polyamine.