Table 2.

Complete index of families of transport proteins in the TC systema

TC no. (subclass)Family
1.A.  α-Type channels
 1.A.1Voltage-gated ion channel (VIC) superfamily
 1.A.2Animal inward rectifier K+channel (IRK-C) family
 1.A.3Ryanodine-inositol 1,4,5-triphosphate receptor Ca2+ channel (RIR-CaC) family
 1.A.4Transient receptor potential Ca2+ channel (TRP-CC) family
 1.A.5Polycystine cation channel (PCC) family
 1.A.6Epithelial Na+ channel (ENaC) family
 1.A.7ATP-gated cation channel (ACC) family
 1.A.8Major intrinsic protein (MIP) family
 1.A.9Ligand-gated ion channel (LIC) family of neurotransmitter receptors
 1.A.10Glutamate-gated ion channel (GIC) family of neurotransmitter receptors
 1.A.11Chloride channel (CIC) family
 1.A.12Organellar chloride channel (O-CIC) family
 1.A.13Epithelial chloride channel (E-CIC) family
 1.A.14Nonselective cation channel-1 (NSCC1) family
 1.A.15Nonselective cation channel-2 (NSCC2) family
 1.A.16Yeast stretch-activated, cation-selective, Ca2+ channel, Mid1 (Mid1) family
 1.A.17Chloroplast outer envelope solute channel (CSC) family
 1.A.18Chloroplast envelope anion channel-forming Tic110 (Tic110) family
 1.A.19Influenza virus matrix-2 channel (IVC) family
 1.A.20gp91phox phagocyte NADPH oxidase-associated cytochrome b558 (CybB) H+ channel family
 1.A.21Bcl-2 (Bcl-2) family
 1.A.22Large conductance mechanosensitive ion channel (MscL) family
 1.A.23Small conductance mechanosensitive ion channel (MscS) family
 1.A.24Gap junction-forming connexin (connexin) family
 1.A.25Gap junction-forming innexin (innexin) family
 1.A.26Symbiotic ammonium transporter (SAT) family
 1.A.27Phospholemman (PLM) family
 1.A.28P21 holin S (P21 holin) family
 1.A.29λ holin S (λ holin) family
 1.A.30P2 holin TM (P2 holin) family
 1.A.31LydA holin (LydA holin) family
 1.A.32PRD1 holin M (PRD1 holin) family
 1.A.33T7 holin (T7 holin) family
 1.A.34HP1 holin (HP1 holin) family
 1.A.35T4 holin (T4 holin) family
 1.A.36T4 immunity holin (T4 immunity holin) family
 1.A.37φ29 holin (φ29 holin) family
 1.A.38φ11 holin (φ11 holin) family
 1.A.39φAdh holin (φAdh holin) family
 1.A.40φU53 holin (φU53 holin) family
 1.A.41LrgA holin (LrgA holin) family
 1.A.42ArpQ holin (ArpQ holin) family
 1.A.43Cph1 holin (Cph1 holin) family
 1.A.44Urea transporter (UT) family
 1.A.45H+- or Na+-translocating bacterial flagellar motor (Mot) family
1.B.  β-Barrel porins
 1.B.1General bacterial porin (GBP) family
 1.B.2Chlamydial porin (CP) family
 1.B.3Sugar porin (SP) family
 1.B.4Brucella-Rhizobium porin (BRP) family
 1.B.5Pseudomonas OprP porin (POP) family
 1.B.6OmpA-OmpF porin (OOP) family
 1.B.7Rhodobacter PorCa porin (RPP) family
 1.B.8Mitochondrial and plastid porin (MPP) family
 1.B.9FadL outer membrane protein (FadL) family
 1.B.10Nucleoside-specific channel-forming outer membrane porin (Tsx) family
 1.B.11Outer membrane fimbrial usher porin (FUP) family
 1.B.12Autotransporter (AT) family
 1.B.13Alginate export porin (AEP) family
 1.B.14Outer membrane receptor (OMR) family
 1.B.15Raffinose porin (RafY) family
 1.B.16Short-chain amide and urea porin (SAP) family
 1.B.17Outer membrane factor (OMF) family
 1.B.18Outer membrane auxiliary (OMA) protein family
 1.B.19Glucose-selective OprB porin (OprB) family
 1.B.20Bacterial toxin export channel (TEC) family
 1.B.21OmpG porin (OmpG) family
 1.B.22Outer bacterial membrane secretin (secretin) family
 1.B.23Cyanobacterial porin (CBP) family
 1.B.24Mycobacterial porin (MBP) family
 1.B.25Outermembrane porin (Opr) family
 1.B.26Cyclodextrin porin (CDP) family
1.C.  Pore-forming toxins
 1.C.1Channel-forming colicin (colicin) family
 1.C.2Channel-forming δ-endotoxin insecticidal crystal protein (ICP) family
 1.C.3α-Hemolysin channel-forming toxin (αHL) family
 1.C.4Aerolysin channel-forming toxin (aerolysin) family
 1.C.5Channel-forming ɛ-toxin (ɛ-toxin) family
 1.C.6Yeast killer toxin K1 (YKT-K1) family
 1.C.7Diphtheria toxin (DT) family
 1.C.8Botulinum and tetanus toxin (BTT) family
 1.C.9Vacuolating cytotoxin (VacA) family
 1.C.10Pore-forming hemolysin E (HlyE) family
 1.C.11Pore-forming RTX toxin (RTX-toxin) family
 1.C.12Thiol-activated cytolysin (TAC) family
 1.C.13Channel-forming leukocidin cytotoxin (Ctx) family
 1.C.14Cytohemolysin (CHL) family
 1.C.15Whipworm stichosome porin (WSP) family
 1.C.16Magainin (magainin) family
 1.C.17Cecropin (cecropin) family
 1.C.18Melittin (melittin) family
 1.C.19Defensin (defensin) family
 1.C.20Nisin (nisin) family
 1.C.21Lacticin 481 (lacticin 481) family
 1.C.22Lactococcin A (lactococcin A) family
 1.C.23Lactocin S (lactocin S) family
 1.C.24Pediocin (pediocin) family
 1.C.25Lactococcin G (lactococcin G) family
 1.C.26Lactacin X (lactacin X) family
 1.C.27Divergicin A (divergicin A) family
 1.C.28AS-48 (AS-48) family
 1.C.29Plantaricin EF (plantaricin EF) family
 1.C.30Plantaricin JK (plantaricin JK) family
 1.C.31Channel-forming colicin V (colicin V) family
 1.C.32Amphipathic peptide mastoparan (mastoparan) family
 1.C.33Cathilicidin (cathilicidin) family
 1.C.34Tachyplesin (tachyplesin) family
 1.C.35Amoebapore (amoebapore) family
 1.C.36Bacterial type III-target cell pore (IIITCP) family
 1.C.37Lactococcin 972 (lactococcin 972) family
 1.C.38Pore-forming equinatoxin (equinatoxin) family
1.D.  Non-ribosomally synthesized channels
 1.D.1Gramicidin A (gramicidin A) channel family
 1.D.2Syringomycin channel-forming (syringomycin) family
 1.D.3Syringopeptin channel-forming (syringopeptin) family
 1.D.4Tolaasin channel-forming (tolassin) family
 1.D.5Alamethicin channel-forming (alamethicin) family
 1.D.6Complexed poly 3-hydroxybutyrate Ca2+channel (cPHB-CC) family
2.A.  Porters: uniporters, symporters, and antiporters
 2.A.1Major facilitator superfamily (MFS)
  2.A.1.1Sugar Porter (SP) family
  2.A.1.2Drug:H+ antiporter-1 (12 spanner) (DHA1) family
  2.A.1.3Drug:H+ antiporter-2 (14 spanner) (DHA2) family
  2.A.1.4Organophosphate:Piantiporter (OPA) family
  2.A.1.5Oligosaccharide:H+ symporter (OHS) family
  2.A.1.6Metabolite:H+ symporter (MHS) family
  2.A.1.7Fucose:H+ symporter (FHS) family
  2.A.1.8Nitrate/nitrite porter (NNP) family
  2.A.1.9Phosphate:H+ symporter (PHS) family
  2.A.1.10Nucleoside:H+ symporter (NHS) family
  2.A.1.11Oxalate:formate antiporter (OFA) family
  2.A.1.12Sialate:H+symporter (SHS) family
  2.A.1.13Monocarboxylate porter (MCP) family
  2.A.1.14Anion:cation symporter (ACS) family
  2.A.1.15Aromatic acid:H+symporter (AAHS) family
  2.A.1.16Siderophore-iron transporter (SIT) family
  2.A.1.17Cyanate permease (CP) family
  2.A.1.18Polyol permease (PP) family
  2.A.1.19Organic cation transporter (OCT) family
  2.A.1.20Sugar efflux transporter (SET) family
  2.A.1.21Drug:H+ antiporter-3 (12 spanner) (DHA3) family
  2.A.1.22Vesicular neurotransmitter transporter (VNT) family
  2.A.1.23Conjugated bile salt transporter (BST) family
  2.A.1.24Unknown major facilitator-1 (UMF1) family
  2.A.1.25Peptide-acetyl-coenzyme A transporter (PAT) family
  2.A.1.26Unknown major facilitator-2 (UMF2) family
  2.A.1.27Phenyl propionate permease (PPP) family
  2.A.1.28Unknown major facilitator-3 (UMF3) family
  2.A.1.29Unknown major facilitator-4 (UMF4) family
 2.A.2Glycoside-pentoside-hexuronide (GPH):cation symporter family
 2.A.3Amino acid-polyamine-organocation (APC) superfamily
  2.A.3.1Amino acid transporter (AAT) family
  2.A.3.2Basic amino acid/polyamine antiporter (APA) family
  2.A.3.3Cationic amino acid transporter (CAT) family
  2.A.3.4Amino acid/choline transporter (ACT) family
  2.A.3.5Ethanolamine transporter (EAT) family
  2.A.3.6Archaeal/bacterial transporter (ABT) family
  2.A.3.7Glutamate:γ-aminobutyrate (GABA) antiporter (GGA) family
  2.A.3.8l-Type amino acid transporter (LAT) family
  2.A.3.9Spore germination protein (SGP) family
  2.A.3.10Yeast amino acid transporter (YAT) family
 2.A.4Cation diffusion facilitator (CDF) family
 2.A.5Zinc (Zn2+)-iron (Fe2+) permease (ZIP) family
 2.A.6Resistance-nodulation-cell division (RND) superfamily
  2.A.6.1Heavy metal efflux (HME) family
  2.A.6.2(Largely gram-negative bacterial) hydrophobe/amphiphile efflux-1 (HAE1) family
  2.A.6.3Putative nodulation factor exporter (NFE) family
  2.A.6.4SecDF (SecDF) family
  2.A.6.5(Gram-positive bacterial) hydrophobe/amphiphile efflux-2 (HAE2) family
  2.A.6.6Eukaryotic (putative) sterol transporter (EST) family
  2.A.6.7(Largely archaeal putative) hydrophobe/amphiphile efflux-3 (HAE3) family
 2.A.7Small multidrug resistance (SMR) family
 2.A.8Gluconate:H+ symporter (GntP) family
 2.A.9l-Rhamnose transporter (RhaT) family
 2.A.102-Keto-3-deoxygluconate transporter (KDGT) family
 2.A.11Citrate-Mg2+:H+(CitM)–citrate:H+ (CitH) symporter (CitMHS) family
 2.A.12ATP:ADP antiporter (AAA) family
 2.A.13C4-dicarboxylate uptake (Dcu) family
 2.A.14Lactate permease (LctP) family
 2.A.15Betaine/Carnitine/Choline transporter (BCCT) family
 2.A.16Telurite resistance/dicarboxylate transporter (TDT) family
 2.A.17Proton-dependent oligopeptide transporter (POT) family
 2.A.18Amino acid/auxin permease (AAAP) family
 2.A.19Ca2+:cation antiporter (CaCA) family
 2.A.20Inorganic phosphate transporter (PiT) family
 2.A.21Solute:sodium symporter (SSS) family
 2.A.22Neurotransmitter:sodium symporter (NSS) family
 2.A.23Dicarboxylate/amino acid:cation (Na+ or H+) symporter (DAACS) family
 2.A.24Citrate:cation symporter (CCS) family
 2.A.25Alanine or glycine:cation symporter (AGCS) family
 2.A.26Branched-chain amino acid:cation symporter (LIVCS) family
 2.A.27Glutamate:Na+ symporter (ESS) family
 2.A.28Bile acid:Na+ symporter (BASS) family
 2.A.29Mitochondrial carrier (MC) family
 2.A.30Cation-chloride cotransporter (CCC) family
 2.A.31Anion Exchanger (AE) family
 2.A.32Silicon transporter (Sit) family
 2.A.33NhaA Na+:H+ antiporter (NhaA) family
 2.A.34NhaB Na+:H+ antiporter (NhaB) family
 2.A.35NhaC Na+:H+ antiporter (NhaC) family
 2.A.36Monovalent cation:proton antiporter-1 (CPA1) family
 2.A.37Monovalent cation:proton antiporter-2 (CPA2) family
 2.A.38K+transporter (Trk) family
 2.A.39Nucleobase:cation symporter-1 (NCS1) family
 2.A.40Nucleobase:cation symporter-2 (NCS2) family
 2.A.41Concentrative nucleoside transporter (CNT) family
 2.A.42Hydroxyl/aromatic amino acid permease (HAAAP) family
 2.A.43Lysosomal cystine transporter (LCT) family
 2.A.44Formate-nitrite transporter (FNT) family
 2.A.45Arsenite-antimonite (ArsB) efflux family
 2.A.46Benzoate:H+ symporter (BenE) family
 2.A.47Divalent anion:Na+ symporter (DASS) family
 2.A.48Reduced folate carrier (RFC) family
 2.A.49Ammonium transporter (Amt) family
 2.A.50Triose-phosphate/nucleoside-sugar transporter (TP-NST) family
 2.A.51Chromate ion transporter (CHR) family
 2.A.52Ni2+-Co2+ transporter (NiCoT) family
 2.A.53Sulfate permease (SulP) family
 2.A.54Mitochondrial tricarboxylate carrier (MTC) family
 2.A.55Metal ion (Mn2+-ion) transporter (Nramp) family
 2.A.56Tripartite ATP-independent periplasmic transporter (TRAP-T) family
 2.A.57Equilibrative nucleoside transporter (ENT) family
 2.A.58Phosphate:Na+symporter (PNaS) family
 2.A.59Arsenical resistance-3 (ACR3) family
 2.A.60Organo anion transporter (OAT) family
 2.A.61C4-dicarboxylate uptake C (DcuC) family
 2.A.62NhaD Na+:H+ antiporter (NhaD) family
 2.A.63Monovalent cation (K+ or Na+):proton antiporter-3 (CPA3) family
 2.A.64Type V secretory pathway or twin-arginine-targeting (Tat) family
 2.A.65Bilirubin transporter (BRT) family
 2.A.66Multi antimicrobial extrusion (MATE) family
 2.A.67Oligopeptide transporter (OPT) family
 2.A.68p-Aminobenzoyl-glutamate transporter (AbgT) family
 2.A.69Auxin efflux carrier (AEC) family
 2.A.70Malonate:Na+ symporter (MSS) family
 2.A.71Folate-biopterin transporter (FBT) family
 2.A.72K+ uptake permease (KUP) family
 2.A.73Inorganic carbon (HCO3) transporter (ICT) family
 2.A.744-TMS multidrug endosomal transporter (MET) family
 2.A.75l-Lysine exporter (LysE) family
 2.A.76Resistance to homoserine/threonine (RhtB) family
 2.A.77Cadmium resistance (CadD) family
 2.A.78Carboxylate/amino acid/amine transporter (CAAT) family
2.B  Non-ribosomally synthesized porters
 2.B.1Valinomycin carrier (valinomycin) family
 2.B.2Monensin (monensin) family
 2.B.3Nigericin (nigericin) family
 2.B.4Macrotetrolide antibiotic (MA) family
 2.B.5Macrocyclic polyether (MP) family
2.C  Ion gradient-driven energizers
 2.C.1TonB-ExbB-ExbD/TolA-TolQ-TolR (TonB) family of auxiliary proteins for energization of outer membrane receptor (OMR)-mediated active transport
3.A  Diphosphate bond hydrolysis-driven transporters
 3.A.1ATP-binding cassette (ABC) superfamily
ABC-type uptake permeases (All from prokaryotes [bacteria and archaea])
  3.A.1.1Carbohydrate uptake transporter-1 (CUT1) family
  3.A.1.2Carbohydrate uptake transporter-2 (CUT2) family
  3.A.1.3Polar amino acid uptake transporter (PAAT) family
  3.A.1.4Hydrophobic amino acid uptake transporter (HAAT) family
  3.A.1.5Peptide/opine/nickel uptake transporter (PepT) family
  3.A.1.6Sulfate uptake transporter (SulT) family
  3.A.1.7Phosphate uptake transporter (PhoT) family
  3.A.1.8Molybdate uptake transporter (MolT) family
  3.A.1.9Phosphonate uptake transporter (PhnT) family
  3.A.1.10Ferric iron uptake transporter (FeT) family
  3.A.1.11Polyamine/opine/phosphonate uptake transporter (POPT) family
  3.A.1.12Quaternary amine uptake transporter (QAT) family
  3.A.1.13Vitamin B12 uptake transporter (VB12T) family
  3.A.1.14Iron chelate uptake transporter (FeCT) family
  3.A.1.15Manganese/zinc/iron chelate uptake transporter (MZT) family
  3.A.1.16Nitrate/nitrite/cyanate uptake transporter (NitT) family
  3.A.1.17Taurine uptake transporter (TauT) family
  3.A.1.18Putative cobalt uptake transporter (CoT) family
  3.A.1.19Thiamine uptake transporter (ThiT) family
  3.A.1.20Brachyspirairon transporter (BIT) family
ABC-type efflux permeases (prokaryotic)
  3.A.1.101Capsular polysaccharide exporter (CPSE) family
  3.A.1.102Lipooligosaccharide exporter (LOSE) family
  3.A.1.103Lipopolysaccharide exporter (LPSE) family
  3.A.1.104Teichoic acid exporter (TAE) family
  3.A.1.105Drug exporter (DrugE1) family
  3.A.1.106Putative lipid A exporter (LipidE) family
  3.A.1.107Putative heme exporter (HemeE) family
  3.A.1.108β-Glucan exporter (GlucanE) family
  3.A.1.109Protein-1 exporter (Prot1E) family
  3.A.1.110Protein-2 exporter (Prot2E) family
  3.A.1.111Peptide-1 exporter (Pep1E) family
  3.A.1.112Peptide-2 exporter (Pep2E) family
  3.A.1.113Peptide-3 exporter (Pep3E) family
  3.A.1.114Probable glycolipid exporter (DevE) family
  3.A.1.115Na+ exporter (NatE) family
  3.A.1.116Microcin B17 exporter (McbE) family
  3.A.1.117Drug exporter-2 (DrugE2) family
  3.A.1.118Microcin J25 exporter (McjD) family
  3.A.1.119Drug/siderophore exporter-3 (DrugE3) family
ABC-type efflux permeases (mostly eukaryotic)
  3.A.1.201Multidrug resistance exporter (MDR) family
  3.A.1.202Cystic fibrosis transmembrane conductance exporter (CFTR) family
  3.A.1.203Peroxysomal fatty acyl coenzyme A transporter (FAT) family
  3.A.1.204Eye pigment precursor transporter (EPP) family
  3.A.1.205Pleiotropic drug resistance (PDR) family
  3.A.1.206a-Factor sex pheromone exporter (STE) family
  3.A.1.207Conjugate transporter-1 (CT1) family
  3.A.1.208Conjugate transporter-2 (CT2) family
  3.A.1.209Major histocompatibility complex peptide transporter (TAP) family
  3.A.1.210Heavy-metal transporter (HMT) family
 3.A.2H+- or Na+-translocating F-type, V-type, and A-type ATPase (F-ATPase) superfamily
 3.A.3P-type ATPase (P-ATPase) superfamily
 3.A.4Arsenite-antimonite (ArsAB) efflux family
 3.A.5Type II (general) secretory pathway (IISP) family
 3.A.6Type III (virulence-related) secretory pathway (IIISP) family
 3.A.7Type IV (conjugal DNA-protein transfer or VirB) secretory pathway (IVSP) family
 3.A.8Mitochondrial protein translocase (MPT) family
 3.A.9Chloroplast envelope protein translocase (CEPT or Tic-Toc) family
 3.A.10H+-translocating pyrophosphatase (H+-PPase) family
 3.A.11Bacterial competence-related DNA transformation transporter (DNA-T) family
3.B.  Decarboxylation-driven active transporters
 3.B.1Na+-transporting carboxylic acid decarboxylase (NaT-DC) family
3.C.  Methyl transfer-driven transporters
 3.C.1Na+-transporting methyltetrahydromethanopterin:coenzyme M methyltransferase (NaT-MMM) family
3.D.  Oxidoreduction-driven active transporters
 3.D.1Proton/sodium-translocating NADH dehydrogenase (NDH) family
 3.D.2Proton-translocating transhydrogenase (PTH) family
 3.D.3Proton-translocating quinol:cytochromec reductase (QCR) superfamily
 3.D.4Proton-translocating cytochrome oxidase (COX) superfamily
 3.D.5Na+-translocating NADH:quinone dehydrogenase (Na-NDH) family
 3.D.6Putative ion (H+ or Na+)-translocating NADH:ferredoxin oxidoreductase (NFO) family
 3.D.7H2:heterodisulfide/oxidoreductase (HHO) family
 3.D.8Na+- or H+-pumping formyl methanofuran dehydrogenase (FMF-DH) family
3.E.  Light-driven active transporters
 3.E.1Ion-translocating fungal/archaeal rhodopsin (FAR) family
 3.E.2Photosynthetic reaction center (PRC) family
4.A.  Phosphoryl transfer-driven group translocators
 4.A.1PTS glucose-glucoside (Glc) family
 4.A.2PTS fructose-mannitol (Fru) family
 4.A.3PTS lactose-N,N′-diacetylchitobiose-β-glucoside (Lac) family
 4.A.4PTS glucitol (Gut) family
 4.A.5PTS galactitol (Gat) family
 4.A.6PTS Mannose-fructose-sorbose (Man) family
8.A. Auxiliary transport proteins
 8.A.1Membrane fusion protein (MFP) family
 8.A.2Secretin auxiliary lipoprotein (SAL) family
 8.A.3Cytoplasmic membrane-periplasmic auxiliary-1 (MPA1) protein with cytoplasmic (C) domain (MPA1−C or MPA1+C) family
 8.A.4Cytoplasmic membrane-periplasmic auxiliary-2 (MPA2) family
 8.A.5Voltage-gated K+ channel β-subunit (VICβ) family
 8.A.7Phosphotransferase system enzyme I (EI) family
 8.A.8Phosphotransferase system HPr (HPr) family
 8.A.9rBAT transport accessory protein (rBAT) family
 8.A.10Slow voltage-gated K+ channel accessory protein (MinK) family
 8.A.11Phospholamban (Ca2+-ATPase regulator) (PLB) family
 8.A.12ABC bacteriocin exporter accessory protein (BEA) family
 8.A.13Tetratricopeptide repeat (Tpr1) family
9.A. Transporters of Unknown Classification
 9.A.1Polysaccharide transporter (PST) family
 9.A.2MerTP mercuric ion (Hg2+) permease (MerTP) family
 9.A.3MerC mercuric ion (Hg2+) uptake (MerC) family
 9.A.4Nicotinamide mononucleotide (NMN) uptake permease (PnuC) family
 9.A.5Cytochrome oxidase biogenesis (Oxa1) family
 9.A.6Intracellular nucleoside transporter (INT) family
 9.A.8Ferrous iron uptake (FeoB) family
 9.A.9Low-affinity Fe2+ transporter (FeT) family
 9.A.10Oxidase-dependent Fe2+ transporter (OFeT) family
 9.A.11Copper transporter-1 (Ctr1) family
 9.A.12Copper transporter-2 (Ctr2) family
 9.A.13Short-chain fatty acid transporter (scFAT) family
 9.A.14Nuclear pore complex (NPC) family
 9.A.15Putative amide transporter (Ami) family
 9.A.16Septal DNA translocator (SDT) family
 9.A.17Metal ion transporter (MIT) family
 9.A.18Peptide uptake permease (PUP) family
 9.A.19Mg2+ transporter-E (MgtE) family
 9.A.20Low-affinity cation transporter (LCT) family
9.B. Putative uncharacterized transporters
 9.B.1Metal homeostasis protein (MHP) family
 9.B.2Ca2+homeostasis protein (CHP) family
 9.B.3Putative bacterial murein precursor exporter (MPE) family
 9.B.4Putative efflux transporter (PET) family
 9.B.5KX blood group antigen (KXA) family
 9.B.6Toxic Hok/Gef protein (Hok/Gef) family
 9.B.7Putative bacteriochlorophyll delivery (BCD) family
 9.B.8Canalicular bile acid transporter (C-BAT) family
 9.B.9Urate transporter (UAT) family
 9.B.106TMS putative MarC transporter (MarC) family
 9.B.11Mitochondrial mRNA splicing-2 protein (MRS2) family
 9.B.12Stress (salt or low-temperature)-induced hydrophobic peptide (SHP) family
 9.B.13Putative pore-forming entericidin (ECN) family
 9.B.14Putative heme exporter protein (HEP) family
 9.B.15Putative chloroquine resistance Na+/H+ exchanger of Plasmodium falciparum (CQR) family
 9.B.16Putative ductin channel (ductin) family
 9.B.17Putative fatty acid transporter (FAT) family
 9.B.18SecDF-associated single transmembrane protein (SSTP) family
 9.B.19Mn2+ homeostasis protein (MnHP) family
 9.B.20Putative Mg2+ transporter-C (MgtC) family
 9.B.21Frataxin (frataxin) family
 9.B.22Putative permease (PerM) family
 9.B.23Verapamil-reversible chloroquine resistance (VCR) family
 9.B.24Testis-enhanced gene transfer (TEGT) family
 9.B.25YbbM (YbbM) family
 9.B.26PF27 (PF27) family
 9.B.27YdjX-Z (YdjX-Z) family
 9.B.28YqaE (YqaE) family
 9.B.29YebN (YebN) family
 9.B.30Hly III (Hly III) family
 9.B.31YqiH (YqiH) family
9.C.  Functionally characterized transporters with unidentified sequences
 9.C.1Endosomal oligosaccharide transporters (EOT)
 9.C.2Volume-sensitive anion channels (VAC)
 9.C.3Rhodococcus erythropolisporin (REP) family
  • a The approved abbreviation for each family listed is given in parentheses.