an ▁Junior ▁Baseball ▁Championship <0x0A> </s> ▁Mon oc ar box yl ate ▁trans porter ▁ 8 ▁( M CT 8 ) ▁is ▁an ▁active ▁trans porter ▁protein ▁that ▁in ▁humans ▁is ▁encoded ▁by ▁the ▁S LC 1 6 A 2 ▁gene . ▁ ▁Function ▁▁ ▁M CT 8 ▁act ively ▁trans ports ▁a ▁variety ▁of ▁i odo - thy ron ines ▁including ▁the ▁thy roid ▁h orm ones ▁T 3 ▁and ▁T 4 . ▁ ▁C lin ical ▁significance ▁▁ ▁A ▁gen etic ▁dis order ▁( dis cover ed ▁in ▁ 2 0 0 3 ▁and ▁ 2 0 0 4 ) ▁is ▁caused ▁by ▁mut ation ▁in ▁the ▁trans porter ▁of ▁thy roid ▁h orm one , ▁M CT 8 , ▁also ▁known ▁as ▁S LC 1 6 A 2 , ▁is ▁believed ▁to ▁be ▁account ▁for ▁a ▁significant ▁fraction ▁of ▁the ▁und i agn osed ▁ne uro log ical ▁dis orders ▁( us ually ▁resulting ▁in ▁hyp ot onic / f lo ppy ▁inf ants ▁with ▁delayed ▁mil est ones ). ▁This ▁gen etic ▁defect ▁was ▁known ▁as ▁All an – Her nd on – D ud ley ▁synd rome ▁( since ▁ 1 9 4 4 ) ▁without ▁knowing ▁its ▁actual ▁cause . ▁It ▁has ▁been ▁shown ▁mut ated ▁in ▁cases ▁of ▁X - link ed ▁le uk o ence phal op ath y . ▁Some ▁of ▁the ▁sympt oms ▁for ▁this ▁dis order ▁as ▁are ▁follows : ▁normal ▁to ▁slightly ▁elev ated ▁T SH , ▁elev ated ▁T 3