Mitchell R M, Loeblich L A, Klotz L C, Loeblich A R
Science. 1979 Jun 8;204(4397):1082-4. doi: 10.1126/science.377486.
The organism Methanobacterium thermoautotrophicum, an archaebacterium, is envolutionarily very distant from both traditional prokaryotes and eukaryotes. Its genome (DNA) has physical characteristics typical of most prokaryotes except that it is quite small (about 10(9) daltons, less than half the size of the genome of Escherichia coli) and contains a significant amount (6 percent) DNA which renatures extremely rapidly.
嗜热自养甲烷杆菌，一种古细菌，在进化上与传统的原核生物和真核生物都相距甚远。它的基因组（DNA）具有大多数原核生物典型的物理特征，只是它相当小（约10⁹道尔顿，不到大肠杆菌基因组大小的一半），并且含有大量（6%）复性极快的DNA。
