data indicate that CDY2 and HSFY are located within a segment of the Y chromosome that is important for sperm maturation, and are underexpressed in testicular tissue derived from men with maturation arrest | Deletion or underexpression of the Y-chromosome genes CDY2 and HSFY is associated with maturation arrest in American men with nonobstructive azoospermia. Stahl PJ, Mielnik AN, Barbieri CE, Schlegel PN, Paduch DA., Free PMC Article | 01/26/2013 |