part_of part of part of has_part has part has part apical plasma membrane GO:0016324 The region of the plasma membrane located at the apical end of the cell. cellular_component apical part of cell plasma membrane region AQP1 AQP2 AQP6 LRP2 PDGFRB SLC26A4 PODXL SCNN1G SLC4A2 SLC9A3 SLC12A1 SLC12A3 SLC34A1 UMOD CUBN SLC14A2 CLDN1 TRPV5 TRPM6 SLC5A12 ATP6V0D2