H-Y Antigen

**Definition:** A sex-specific cell surface antigen produced by the sex-determining gene of the Y chromosome in mammals. It causes syngeneic grafts from males to females to be rejected and interacts with somatic elements of the embryologic undifferentiated gonad to produce testicular organogenesis.

**Tree numbers:** - D23.050.301.500.600.400 - D23.050.705.552.600.400

**Synonyms:** - GA-1 Germ Cell Antigen - HY Antigen