<s>[INST] <<SYS>> This is a medical question of type : inheritance <</SYS>> Is protein C deficiency inherited ? [/INST] Protein C deficiency is inherited in an autosomal dominant pattern, which means one altered copy of the PROC gene in each cell is sufficient to cause mild protein C deficiency. Individuals who inherit two altered copies of this gene in each cell have severe protein C deficiency. </s>