Another protein called kallikrein 6 seems to be associated with amyloidogenic potential since it is found in relatively elevated quantities in cerebrospinal liquid in cases of AD [93] and, recently, aquaporin was associated with edema and microvascular alterations in the brains of those with AD [94, 95]; however, the diagnosis of AD using these proteins is not completely feasible today. Here, KLK6 is linked to Alzheimer disease.