Sperm Protein Associated With the Nucleus on the X Chromosome A

**Semantic type:** Amino Acid, Peptide, or Protein

**Definition:** Sperm protein associated with the nucleus on the X chromosome A (97 aa, ~11 kDa) is encoded by the human SPANXA2 and SPANXA1 genes. This protein plays a role in spermatogenesis.

**Synonyms:** - CT11.1 - Cancer/Testis Antigen 11.1 - Nuclear-Associated Protein SPAN-Xa - SPAN-X - SPANX Family Member A - SPANX-A