Table 16.

Classification of transport systems functioning by an unknown mechanism (class 9.A) according to substrate specificity

SubstrateTC no.FamilyOrganismal group
I.A. Nonselective
I.C. Inorganic cations
 Cation (nonselective)9.A.17MITB, A, E
 Cation (nonselective)9.A.20LCTPl
 Cu2+(in)9.A.12Ctr2An, Pl, Pr, Y
 Fe2+(in)9.A.8FeoBB, A
 Mg2+(in)9.A.19MgtEB, A
II.B. Monocarboxylates
 Fatty acids (short chain)9.A.13scFATB
III.B. Amides and amines
 Amides (in)9.A.15.1.1–2AmiB
 Urea (in)9.A.15.1.3AmiB
III.C. Peptides
 Peptides (in)9.A.18PUPB
IV.A. Bases
 Uric acid (out)9.A.17UATAn
IV.B. Nucleoside
 Nucleosides (general)9.A.6INTAn
IV.C. Nucleotides
 Nicotinamide mononucleotide (in)9.A.4PnuCG− B
V. Vitamins
 Nicotinamide mononucleotide (in)9.A.4PnuCG− B
VII.A. Complex carbohydrates
 Capsular polysaccharides (out)9.A.1.2.2PSTG+ B
 Exopolysaccharides (out)9.A.1.2.1PSTG− B
 Lipopolysaccharides (out)9.A.1.1.1PSTG− B
VII.B. Proteins
 Proteins9.A.5Oxa1E (mito), B, A
 Microcins (uptake)9.A.18.1.2PUPG− B
VII.C. Nucleic acids
 DNA9.A.16.1.1–2SDTG+ B