Table 1.

The SLC12 family of electroneutral cation-coupled Cl co-transporters

Member* Co-transport ions Tissue distribution Disease
SLC12A1 (NKCC2)   Na+/K+/2Cl-  Kidney-specific (TAL)   Bartter's syndrome type I  
SLC12A2 (NKCC1)   Na+/K+/2Cl-  Ubiquitous   None  
SLC12A3 (NCC)   Na+/Cl-  Kidney-specific (DCT); bone?   Gitelman's syndrome  
SLC12A4 (KCC1)   K+/Cl-  Ubiquitous   None  
SLC12A5 (KCC2)   K+/Cl-  Neuron-specific   None  
SLC12A6 (KCC3)   K+/Cl-  Widespread   Anderman's syndrome  
SLC12A7 (KCC4)   K+/Cl-  Widespread   None  
SLC12A8 (CCC9)   Unknown   Widespread   Psoriasis  
SLC12A9 (CIP)   Unknown   Widespread   None  
Member* Co-transport ions Tissue distribution Disease
SLC12A1 (NKCC2)   Na+/K+/2Cl-  Kidney-specific (TAL)   Bartter's syndrome type I  
SLC12A2 (NKCC1)   Na+/K+/2Cl-  Ubiquitous   None  
SLC12A3 (NCC)   Na+/Cl-  Kidney-specific (DCT); bone?   Gitelman's syndrome  
SLC12A4 (KCC1)   K+/Cl-  Ubiquitous   None  
SLC12A5 (KCC2)   K+/Cl-  Neuron-specific   None  
SLC12A6 (KCC3)   K+/Cl-  Widespread   Anderman's syndrome  
SLC12A7 (KCC4)   K+/Cl-  Widespread   None  
SLC12A8 (CCC9)   Unknown   Widespread   Psoriasis  
SLC12A9 (CIP)   Unknown   Widespread   None  
*

Names in parentheses indicate the protein symbol.

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