e/Lewis antigen system

Information
has gloss	eng: The Lewis antigen system is a human blood group system based upon genes on chromosome 19 q13.3, (FUT2) and 19p13.3 (FUT3), which both have fucosyltransferase activity. There are two main types of Lewis antigens, Lewis a and Lewis b. They are red cell antigens which are not produced by the erythrocyte itself. Instead, Lewis antigens are a component of exocrine epithelial secretions, and are subsequently adsorbed onto the surface of the erythrocyte.
lexicalization	eng: Lewis antigen system
instance of	(noun) human blood cells (usually just the red blood cells) that have the same antigens blood type, blood group