Figure 2From: Few amino acid positions in rpoB are associated with most of the rifampin resistance in Mycobacterium tuberculosisCross-validated pruned classification tree for rifampin susceptibility and resistance based on amino acid sequence data from positions 511–533 of the β subunit of RNA polymerase of Mycobacterium tuberculosis . The numbers of observations in each class, susceptible or resistant, are given for each node.Back to article page