In addition, SMG9 in AD [73], TCTA in anorexia nervosa [74, 75], RHOA and IMPDH2 in intelligence [76, 77], CRHR1 in PD [78], and PHF7 in schizophrenia [79] are all reported to be conserved among a wide range of species, although their relations with the corresponding traits remain to be explored. The gene discussed is IMPDH2; the disease is Alzheimer disease.