ptx homeobox protein pituitary homeobox 2 paired-like homeodomain transcription factor Munc 30 A ptx homeobox protein that is a translation product of the human PITX2 gene or a 1:1 ortholog thereof. The PITX2 gene contains 6 conserved exons. Category=gene. Otlx2 ARP1 RIEG bicoid-related homeobox transcription factor protein solurshin PITX2 orthodenticle-like homeobox 2 homeobox protein PITX2 Brx1 PR:000000117 ALL1-responsive protein ARP1 RIEG paired-like homeodomain transcription factor 2 RIEG1 Ptx2 BRX1 homeoprotein RGS