Problem details: He is suffering Citrullinemia, type II is a condition in which the body is unable to make citrin, a protein that helps move substances within the cells. These substances are important for breaking down sugars, producing proteins and nucleotides, and allowing for the normal function of the liver. CIT II is considered an amino acid condition because people with this condition are unable to transport certain amino acids into mitochondria, the energy-production centers of the cell. You may also hear CIT II called a urea cycle condition. This name is used to describe conditions that cause ammonia to accumulate in the bloodstream.