Scaled Bayes factors for CAP255. There was strong evidence of an association with ID50 titer at sites 332, 334 and 351 when the ConC reference sequence was used. The predictions at sites 332 and 334 were tested and validated experimentally (see Table 1). There were several sites surrounding these three positions in the C3 region that were moderately associated with neutralization sensitivity. The background shading is described in the legend of Figure 2.