Fig. 9

Model of acid-base transporters involved in intracellular pH regulation expressed on the apical (AM) and basolateral (BLM) membranes of coral cells throughout the tissue layers. The roles of other ion channels and transporters involved in other cellular processes are not considered here. Transporters that are more highly expressed in the oral fraction (oral-specific) are coloured in blue, those that are more highly expressed in the total colony (aboral-specific) are coloured in orange, and those that are expressed at the same levels in both fractions (ubiquitous) are coloured in green. Other enzymes (CA = carbonic anhydrase) and transporters (PMCA = Ca^+ 2 ATPase) involved in the H⁺ flux balance are represented in bold letters