The HGNC Solute Carrier Family Series
Total
  SLC1: The high affinity glutamate and neutral amino acid transporter family
7
  SLC2: The facilitative GLUT transporter family
14
  SLC3: The heavy subunits of the heteromeric amino acid transporters
2
  SLC4: The bicarbonate transporter family
11
  SLC5: The sodium glucose cotransporter family
12
  SLC6: The sodium- and chloride- dependent neurotransmitter transporter family
20
  SLC7: The cationic amino acid transporter/glycoprotein-associated family
14
  SLC8: The Na+/Ca2+ exchanger family
3
  SLC9: The Na+/H+ exchanger family
11
  SLC10: The sodium bile salt cotransport family
6
  SLC11: The proton coupled metal ion transporter family
2
  SLC12: The electroneutral cation-Cl cotransporter family
9
  SLC13: The human Na+-sulfate/carboxylate cotransporter family
5
  SLC14: The urea transporter family
2
  SLC15: The proton oligopeptide cotransporter family
4
  SLC16: The monocarboxylate transporter family
14
  SLC17: The vesicular glutamate transporter family
8
  SLC18: The vesicular amine transporter family
3
  SLC19: The folate/thiamine transporter family
3
  SLC20: The type III Na+-phosphate cotransporter family
2
  SLC21/SLCO: The organic anion transporting family
20
  SLC22: The organic cation/anion/zwitterion transporter family
18
  SLC23: The Na+-dependent ascorbic acid transporter family
4
  SLC24: The Na+/(Ca2+-K+) exchanger family
6
  SLC25: The mitochondrial carrier family
46
  SLC26: The multifunctional anion exchanger family
11
  SLC27: The fatty acid transport protein family
6
  SLC28: The Na+-coupled nucleoside transport family
3
  SLC29: The facilitative nucleoside transporter family
4
  SLC30: The zinc efflux family
10
  SLC31: The copper transporter family
2
  SLC32: The vesicular inhibitory amino acid transporter family
1
  SLC33: The Acety-CoA transporter family
1
  SLC34: The type II Na+-phosphate cotransporter family
3
  SLC35: The nucleoside-sugar transporter family
23
  SLC36: The proton-coupled amino acid transporter family
4
  SLC37: The sugar-phosphate/phosphate exchanger family
4
  SLC38: The System A & N, sodium-coupled neutral amino acid transporter family
6
  SLC39: The metal ion transporter family
14
  SLC40: The basolateral iron transporter family
1
  SLC41: The MgtE-like magnesium transporter family
3
  SLC42: The Rh ammonium transporter family (pending)
3
  SLC43: Na+-independent, system-L like amino acid transporter family
3
  SLC44: Choline-like transporter family
5
  SLC45: Putative sugar transporter family
4
  SLC46: Heme transporter family
3
  TOTAL
360

References:

Hediger MA, Romero MF, Peng JB, Rolfs A, Takanaga H, Bruford EA. The ABCs of solute carriers: physiological, pathological and therapeutic implications of human membrane transport proteins: Introduction. Pflugers Arch. 2004 Feb;447(5):465-8.
 
 
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