Helicobacter Pylori is quite interesting: the medium pH of its colonies is 2

送交者: Wood 于 2008-04-19, 03:43:24:

回答: 幽门螺杆菌：胃病的成因由松鼠于 2008-04-19, 00:42:46:

it can uptake urea from mucus of the stomach

urea are used to make ammonium ion by urease, to neutralise its internal pH