Figure 1From: Expression of urease by Haemophilus influenzaeduring human respiratory tract infection and role in survival in an acid environment1A. Diagram of urease gene cluster. Numbers above genes indicate length of genes in nucleotides and numbers below indicate nucleotides between gene coding sequences. 1B. Diagram of ureC knockout mutant. 1C. Diagram of urease operon knockout mutant.Back to article page