For years, a unicellular creature called Giardia has occupied a special place in biology because it was thought to lack mitochondria. But it does have them — though tiny, they pack a surprising anaerobic punch.
机构:
Smithsonian Inst, Natl Museum Amer Hist, Dept Entomol, Washington, DC 20560 USASmithsonian Inst, Natl Museum Amer Hist, Dept Entomol, Washington, DC 20560 USA