<prompt> The transpoer gene defective in Hanups disease:SLC 6A 19SLC 6A 18SLC 36 A2SLC 7A7  <response>: Hanups disease is due to defective neutral amino acid transpoer. The SLC6A19 is neutral amino acid transpoer involved in the transpo of neutral amino acids like tyrptophan. Tryptophan is the precursor of Niacin vitamin B3 Hanupsdisease is associated with pellagra. Extra edge:- Soluble carrier family SLC proteins are transmembrane proteins involved in facilitated diffusion and secondary active transpo. Nomenclature of SLC protein is: SLCnXm SLC stands for SoLuteCarrier n an integer representing a family e.g., 1-52 X a single letter A, B, C, ... denoting a subfamily m an integer representing an individual family member isoform. 