Table 2.

Putative C. difficile PBPs.

C. difficile R20291 gene designation	Best B. subtilis strain 168 hit	Amino acid identity	Essential in vitro?
0712	PonA	27.3%	Yes
2544	SpoVD	40.1%	No but required for sporulation
1067	SpoVD	27.9% (PbpB 26.6%)	No but required for sporulation
1131	DacF	43.8%	No but required for sporulation
1318	PbpX	21.3% (PbpE 20.4%)	No
2048	DacF	31.5%	No but required for sporulation
0441	DacF	30.3%	No
0985	PbpA	21.2%	Yes
3056	PbpX	20.1%	No but required for sporulation
2390	DacB	27.5%	No