Figure 1. Dissecting the domain architecture of TPCs.
Top panel: schematic illustration of the TPC showing the two hydrophobic domains (I and II) each comprising six TM regions (numbered in domain I) and a pore (P). The domains are connected by a cytosolic loop. A summary of the constructs used in the present study encoding the indicated region, together with the predicted size of the Myc- and/or GFP-fusion proteins are listed in the bottom part of the Figure. Constructs correspond to human (TPC1 and TPC2) or sea urchin (SpTPC1–3) isoforms.