Figure 4From: Brucella abortus ure2 region contains an acid-activated urea transporter and a nickel transport systemUrease activity in a urea gradient. Intact cells exposed to buffer pH 4.2 with increasing amounts of urea. (diamond) 2308, (white square) 2308 ΔureT, (black square) 2308 ΔureT (pFJS243).Back to article page