Genes related to stress response (ceremide kinase like) and nutrient metabolism (phosphoenolpyruvate carboxy-kinase 1, methylmalonic aciduria [cobalamin deficiency] cblB type, glycine receptor alpha 2, solute carrier family 7 member 11, etc.)were also identified to be differentially expressed. The gene discussed is SLC7A11; the disease is vitamin B12 deficiency.