Fig. 3

Growth of Protochlamydia W-9 (W9) and Parachlamydia Bn₉ (Pac) in the immortal human epithelial cell line, HEp-2. The data show changes in the average number of chlamydial 16S rRNA copies per well, ± SD. The bacterial 16S rRNA copy numbers were normalized with the HEp-2 gapdh copy numbers