Network of reported candidate genes associated with GTS. This image was produced (by JW) with Ingenuity pathway analysis software and shows how the proteins encoded by the candidate genes reported to be associated with GTS are linked with each other. Please see legend for description of what each symbol and color represents. ADRA1A, adrenoceptor alpha 1A; ADRA2A, adrenoceptor alpha 2A; ADRA2C, adrenoceptor alpha 2C; BTBD9, BTB (POZ) domain containing 9; CaMKII, calcium/calmodulin-dependent protein kinase II; CCT8, chaperonin containing TCP1, subunit 8 (theta); CNTNAP2, contactin-associated protein-like 2; COMT, catechol-O-methyltransferase; CTNNA3, catenin (cadherin-associated protein), alpha 3; CTTNBP2, contactin binding protein 2; CUL3, cullin 3; DBH, dopamine beta-hydroxylase (dopamine beta-monooxygenase); DLGAP3, discs; large (Drosophila) homolog-associated protein 3; DRD1, dopamine receptor D1, DRD2, dopamine receptor D2, DRD3, dopamine receptor D3, DRD4, dopamine receptor D4, ERK 1/2, extracellular signal-regulated kinases 1/2; HDC, histidine decarboxylase, HNF4A, hepatocyte nuclear factor 4 alpha; HTR2A, 5-hydroxytryptamine (serotonin) receptor 2A; G protein-coupled; HTR2C, 5-hydroxytryptamine (serotonin) receptor 2C; G protein-coupled; IL1RN, interleukin 1 receptor antagonist; KCNE1, potassium channel voltage gated subfamily E regulatory beta subunit 1; KCNE2, potassium channel, voltage gated subfamily E regulatory beta subunit 2; LHX6, LIM homeobox 6; MAOA, monoamine oxidase A; MRPL21, mitochondrial ribosomal protein L21; MRPL3, mitochondrial ribosomal protein L3; MYC, v-myc avian myelocytomatosis viral oncogene homolog; NLGN4X, neuroligin 4, X-linked; NRXN1, neurexin 1; OFCC1, orofacial cleft 1 candidate 1; PPARA, peroxisome proliferator-activated receptor alpha; RCAN1, regulator of calcineurin 1; PSEN1/2, presenilin 1/2; SLC1A3, solute carrier family 1 (glial high affinity glutamate transporter), member 3; SLC6A3, solute carrier family 6 (neurotransmitter transporter); member 3; SLC6A4, solute carrier family 6 (neurotransmitter transporter), member 4, SLITRK1, SLIT, and NTRK-like family, member 1; TPH2, tryptophan hydroxylase 2; YWHAB, tyrosine 3-monooxygenase/tryptophan 5-monooxygenase activation protein, beta.