Figure 3From: Brucella abortus ure2 region contains an acid-activated urea transporter and a nickel transport systempH dependency of urease activity in intact Brucella cells. Intact cells were exposed to the indicated pH for 15 minutes, in buffer containing 5 mM urea and then urease activity determined, and expressed in pmol of NH3 min-1 log10 cfu-1 (diamond) 2308, (white square) 2308 ΔureT, (black square) 2308 ΔureT (pFJS243).Back to article page