α-fetoproteina (AFP)

- fetal protein [1] [2], under phy siological conditions only produced by the cells of fetal liver a nd embryonic yolk sac. In life pozapłodowym alpha-fetoproteina o nly appears in the following situations: alpha-fetoprotein gene i s located on the long arm of the fourth chromosome (4q11-q13) [3]. Structurally, it resembles the albumin gene. It is believed that both genes evolved from 300-500 million years ago as a result of gene duplication - a common ancestor.