In sequence 2 the protein that was discovered was Presenilin or PSEN. Presenilin helps to process proteins that transmit chemical signals from the cell membrane to the nucleus ( PSEN1 gene ). These genes are used for cell growth and maturation.The protein makes sure that the cells are growing properly and that they are maturing properly as well. Presenilin is also known for its role in processing amyloid precursor protein which is located in the brain and the brain tissue (PSEN1 gene ). Amyloid precursor is a protein that is in tissues and concentrates on the synapse area of the brain (PSEN1 gene ). Another role that presenilin has is that it helps to cut down protein into smaller peptides. The mutation that comes from the protein presenilin
