Fig. 4. Rms deviations of Ca atoms between PfPCP and PfC142/188S (a), between PfPCP and TlPCP (b), and between PfPCP and BaPCP (c) after a least fit of the corresponding Ca atoms. In the case of (a), all residues (208) were used. In (b) and (c), the residues corresponding to PfPCP (1 to 177 and 184 to 208) were used.