TABLE 1.

Pore sizes of various proteins

Organism and protein	Pore size determined by:
	Black lipid bilayer analysis (nS)	Liposome analysis (nm)	Crystallography (nm)	Reference(s) or source
Aeromonas salmonicida 28-kDa porin	1.96			26
Bordetella pertussis
BrkA C-terminal domain	3			This study
MOMPd	0.56			1
Campylobacter coli MOMP	0.53	<<1		33
Escherichia coli
OmpF	2.1	1.2		6, 30
OmpC	1.5	1.1		6, 30
PhoE	1.8			2
K	1.5			6
NmpC	1.3			6
LamB	2.7/0.2			6
OmpA	1.2/0.18a	1		39, 42
OmpG		2		14
Tsx	0.01			7, 27
FepA (ΔRV)b		2		24
TolC	0.08			5
PapC		2	2–3	45
Haemophilus influenzae type b 40-kDa porin	1.1	1.8		48, 49
Legionella pneumophila MOMP	0.1c			18
Mycobacterium chelonae 59-kDa cell wall protein	2.7	2.2		47
Mycobacterium smegmatis
Cell wall extract	4.1			46
40-kDa porin		2		29
Pseudomonas aeruginosa
OprF	5.6/0.36	2		3, 31, 50
OprP	0.28			3
Salmonella typhimurium
OmpC (40K)	2.4			4
OmpF (39K)	2.2			4
OmpD (38K)	2.5			4
Treponema denticola 53-kDa outer sheath protein	10.9			13

^aMeasurements were made in 0.25 M KCl. 

^bA portion of the N-terminus was deleted. 

^cMeasurements were made in 0.1 M NaCl. 

^dMOMP, major outer membrane protein.