Tags: Protein.
Sperm protein associated with the nucleus on the X chromosome A is a protein that in humans is encoded by the SPANXA1 gene.Temporally regulated transcription and translation of several testis-specific genes is required to initiate the series of molecular and morphological changes in the male germ cell lineage necessary for the formation of mature spermatozoa. This gene is a member of the SPANX family of cancer/testis-associated genes which are located in a cluster on chromosome X.