THMD1, or Solute carrier family 19 (thiamine transporter), member 2, is a human gene encoded by SLC19A2. It may also be known as: Thiamine transporter 1; ThTr1; Solute carrier family 19 member 2; Thiamine carrier 1; TC1; ThTr-1; THT1; TRMA. The encoded protein has an amino acid length of 497 and a mass of 55.4 kDa. Other isoforms may exist. THMD1 is a member of the Reduced folate carrier (RFC) transporter (TC 2.A.48) family. Homologs of this gene exist in other organisms, including: Mouse, Rat, Zebrafish, Frog, Chicken.