Carbonic Anhydrase Va Deficiency, also known as ca-va deficiency, is related to carbonic anhydrase va deficiency, hyperammonemia due to and hyperammonemic encephalopathy due to carbonic anhydrase va deficiency, and has symptoms including lethargy An important gene associated with Carbonic Anhydrase Va Deficiency is CA5A (Carbonic Anhydrase 5A), and among its related pathways/superpathways is Reversible hydration of carbon dioxide. Affiliated tissues include liver and brain.