Uptake of synthetic USSs or chromosomal DNAs. The solid bars show uptake of 220 bp PCR fragments containing synthetic USS with the consensus sequences of H. influenzae (Hin), A. pleuropneumoniae (Apl) or randomized H. influenzae USS types. The dashed bars show uptake of chromosomal DNAs from H. influenzae (Hin), A. pleuropneumoniae (Apl) or E. coli. Error bars show the standard deviations of 3 replicate experiments, except for A. pleuropnemoniae in A, which is from 4 replicate experiments. A. Uptake by H. influenzae. B. Uptake by A. pleuropneumoniae.