CA-19-9 Antigen

**Definition:** Sialylated Lewis(a) blood group carbohydrate antigen found in many adenocarcinomas of the digestive tract, especially pancreatic tumors.

**Tree numbers:** - D23.050.285.050.119 - D23.050.301.290.544.119 - D23.050.550.325.119 - D23.050.705.230.544.119 - D23.101.140.075.119

**Synonyms:** - Sialyl Lewis A Antigen - Sialyl Le(a) - CA 19-9 Antigen - CA 19.9 Antigen - Antigen CA-19-9 - Gastrointestinal Cancer Antigen - alpha-Neu5Ac-(2-3)-beta-D-Gal-(1-3)-(alpha-L-Fuc-(1-4))-beta-D-GlcNAc - NAG-1,3-F-1,4-GN - Neu5Ac-2-3-Gal-1-3-(Fuc-1-4)-GlcNAc - Sialyl Lewis A - Sialyl Lewis(a) Tetrasaccharide - 5-Acetylneuraminyl-2-3-Galactosyl-1-3-(Fucopyranosyl-1-4)-N-Acetylglucosamine