Fig. 1

Oligomerization model of Irga6 proposed by Martens in 2004 [15]. Irga6 (labelled according to the old nomenclature as IIGP1) shuttles between endoplasmic reticulum membranes and cytosol. Nucleotide-dependent oligomerization of Irga6 is prevented at the membrane by a yet unknown factor (X). X is missing from the Toxoplasma gondii parasitophorous vacuole allowing Irga6 oligomerization at the vacuole