. "Enzyme DeficiencyPTNCI" . "Enzyme_Deficiency"^^ . "A finding in which there is a subnormal amount of an enzyme. Enzymes are proteins that are necessary in certain catabolic processes.NCI" . "Laboratory or Test Result"^^ . . "abnormal and/or pathologic state usually due to mutations in structural genes for enzyme polypeptides, manifesting as metabolic abnormalities.CSP2003" . "C0149676"^^ . "Enzyme Deficiency"^^ . . . "Specific Enzyme DeficiencyPTNICHD" . "NICHD"^^ . "Enzyme Deficiency"^^ . . "C3492"^^ .