PR:000037669 presenilin-1 sequence variant Y256S (human) hPSEN1/var:Y256S|UniProtKB:P49768-1, Tyr-256, CHEBI:29999 associated_with_disease_progression DOID:10652 Alzheimer's disease Alzforum:psen1-y256s EXP NCBITaxon:9606 Alzforum:psen1-y256s 20180510 PRO:DAN