The Outer Membrane Protein X (OmpX) Family The Intracellular Bacteria Surface Antigen Family The Helicobacter Outer Membrane Porin (HOP-1) Family 1 The Opacity Family The OpcA Family The Helicobacter Outer Membrane Porin (HOP-2) Family 2 The Treponema Porin Major Surface Protein (TP-MSP) Family The Legionella pneumophila major outer membrane protein (LP-MOMP) Family The Intimin/Invasin Family

The Outer Membrane Protein Insertion Porin (OmpIP/Omp85) Family The Two-Partner Secretion (TPS) Family The Autotransporter (AT) Family The Outer Membrane Fimbrial Usher Porin (FUP) Family The Imp/OstA Family The Bacterial Cellulose Synthase Operon Protein C (BcsC) Family The Outer Membrane Factor (OMF) Family The Autotransporter-2 (AT-2) Family The Secretin Family The wzi Family The Alginate Export Porin (algE) Family The Porphyromonas gingivalis PorT Family The Solitary outer membrane autotransporter (Omp_AT) beta-barrel domain Family The Aggregatibacter actinomycetemcomitans omp67/morC Family The Usher_TcfC Family The MDM10 Family The TGD4 Family The TOC75 Family The OEP80 Family The OMP85_2 Family The TP0969 Family The PgaA Family The SprA Family The CsgG Family

The Outer membrane-localized lipid A 3-O-deacylase (PagL) Family The Omptin (OmpT) Family The systemic factor protein A (SfpA/LpxR) Family The Antimicrobial peptide resistance and lipid A acylation protein (PagP) Family The Outer Membrane Phospholipase (OMPLA) Family

The Outer Membrane Receptor (OMR-TonB Dependent Receptor) Family The FadL Outer Membrane Protein (FadL) Family The Nucleoside-specific Channel-forming Outer Membrane Porin (Tsx) Family The Francisella tularensis fslE Family The TbpB_C Family The HpuA Family The VP1243 Family

The OmpA Family The OprF Porin Family The MipA/OmpV Family The Geobacter ompJ Family The Porphyromonas Major Outer Membrane (MOMP/OmpA) Family

The OmpG Porin (OmpG) Family The General Bacterial Porin (GBP-1) Family 1 The General Bacterial Porin (GBP-2) Family 2 The OmpW Family The General Bacterial Porin (GBP-4) Family 4 The Campylobacter jejuni Major Outer Membrane Porin (MomP) Family The Borrelia Porin p13 (BP-p13) Family The Borrelia Oms28 porin Family The Brucella-Rhizobium Porin (BRP) Family The Borrelia Oms66/Omp66 Family The Chlamydial Porin (CP) Family The Leptospira Porin OmpL1 (LP-OmpL1) Family The Campylobacter omp50 Family The MtrB/PioB Family The YbjH Family The Fusobacterial Outer Membrane Porin (fomA) Family The Protochlamydia outer membrane protein The Porin_6 Family The Putative beta barrel porin-7 (BBP7) Family The TbpB_B_D Family The MAC Family The Hemolysin Family The Aerolysin Family The Lysenin Family The OEP24 Family

The Glucose-selective OprB Porin (OprB) Family The Outer Membrane Porin (OprD) Family The Pseudomonas OprP Porin (POP) Family The Oligogalacturonate-specific Porin (KdgM) The Copper resistance protein B (CopB) Family The Sugar Porin (SP) The Acinetobacter baumannii 34-kDa outer membrane protein Family The Cyclodextrin Porin (CymA) Family The Raffinose Porin (rafY) Family The Carbapenem resistance-associated outer membrane protein (carO) Family The Short Chain Amide and Urea Porin (SAP) Family The Porin_OmpG_1_2 Family The VDAC Family The TOM40 Family The OEP21 Family The OEP23 Family The OEP37 Family The OEP40 Family

The YfaZ Outer Membrane Protein Family The Salt-stress induced outer membrane protein (SspA) Family The Type Specific Antigen (TSA) Family The Outer Membrane Protein beta-barrel domain Family The Serpulina hyodysenteriae variable surface protein Family The N4 bacteriophage Receptor (nfrA) Family The BBP2 Family The PorP_SprF Family The BBP2_2 Family The Outer membrane protein beta-barrel Family The F plasmid transfer operon (TraF) Family The DUF2490 Family The DUF3575 Family The Cj0561c Family The Porin10 Family The DUF3078 Family The DUF3138 Family The NilB Family The COG4313 Family The DUF3187 Family The Gcw_chp Family The Putative OmpA-OmpF-like porin Family The DUF5020 Family The Lipoprotein GNA1870 Family The Thermus thermophilus HB27 TtoA Family The Treponema Major outer membrane protein (mspA) Family The Salmonella typhi STY4528 Family The yaiO Outer Membrane Protein Family The Oms38 Spirochaetes Family The DUF4595 Family The DUF2715 Family The UPF0164 Family The Porin_5 Family The DUF4421 Family The DUF5777 Family The Treponema pectinovorum ATCC 33768 mompA Family