<unk>  <unk> , α-fetoprotein; also sometimes called<unk> -1-fetoprotein,<unk> -fetoglobulin, or<unk>  fetal protein) is a protein that in humans is encoded by the<unk>  gene. The<unk>  gene is located on the q arm of chromosome 4 (4q25). Maternal<unk>  serum level is used to screen for Down syndrome, neural tube defects, and other chromosomal abnormalities.<unk>  is a major plasma protein produced by the yolk sac and the fetal liver during fetal development. It is thought to be the fetal analog of serum albumin.<unk>  binds to copper, nickel, fatty acids and bilirubin and is found in monomeric, dimeric and trimeric forms.
Alpha-fetoprotein
Mammaglobin
Carcinoembryonic antigen
Carcinoembryonic antigen peptide-1
AFP-L3
Prostate-specific antigen
CA19-9
CA 15-3