PREP (Prolyl Endopeptidase): PREP is a serine protease involved in the degradation of proline-containing peptides, playing a role in the metabolism of neuropeptides and peptide hormones. It is implicated in the modulation of cognitive processes and the inflammatory response. Alterations in PREP activity have been linked to neurological disorders, including Alzheimer's disease, suggesting its role in neurodegeneration and cognitive function....