Table 2. Sequence identities between Bucl8-associated efflux pump components and known corresponding proteins.

	Protein	Species	PDB code	Sequence identity (%)	Query cover (%)
Bucl8*	VceC	Vibrio cholerae	1YC9	35.8	63
	NodT	Burkholderia mallei	6U94	31.6	61
	CusC	Escherichia coli	3PIK	28.7	61
	OprJ	Pseudomonas aeruginosa PAO1	5AZS	29.9	61
	OprM	Pseudomonas aeruginosa	1WP1	29.0	61
	MtrE	Neisseria gonorrhoeae	4MT0	26.9	61
	TolC	Escherichia coli	1EK9	24.7	38
FusC	FuaA	Stenotrophomonas maltophilia		41.9	44
	AaeB	Klebsiella pneumoniae		24.62	60
	MexB	Pseudomonas aeruginosa	3W9I	NS
	AcrB	Escherichia coli	4ZLJ	NS
	CusA	Escherichia coli	3K07	NS
FusD	AcrZ	Escherichia coli	4C48	NS
	CusF	Escherichia coli	3E6Z	NS
	YajC	Escherichia coli	2RDD (in complex)	NS
FusE	MexA	Pseudomonas aeruginosa		30.99	48
	AcrA	Escherichia coli	2F1M	27.27	48
	BesA	Borreliella afzelii	4KKS	26.56	48
	EmrA	Klebsiella pneumoniae	4TKO	26.73	86
	CusB	Escherichia coli	3H94	NS

NS = No significant similarity

*Comparison to Bucl8 protein sequence without CL-Ct domains.