{"type":"root","children":[{"type":"paragraph","children":[{"type":"text","value":"Placental alkaline phosphatase (PLAP) is a membrane bound enzyme found in trophoblast cells of normal mature human placenta. PLAP plays a role in phosphate metabolism and fetal development. PLAP is also expressed in other tissues like endocervix, fallopian tube, and certain germ cell tumors such as seminomas of testis, cystadenocarcinoma, and dysgerminoma."}]}]}