part_of part of part of has_part has part has part basal plasma membrane basolateral plasma membrane GO:0016323 The region of the plasma membrane that includes the basal end and sides of the cell. Often used in reference to animal polarized epithelial membranes, where the basal membrane is the part attached to the extracellular matrix, or in plant cells, where the basal membrane is defined with respect to the zygotic axis. cellular_component plasma membrane region AQP1 AQP2 AQP3 CA2 SLC4A1 SLC4A2 SLC14A1 UMOD SLC22A6 SLC22A8 SLC22A7 SLC26A7