Bidirectional transcription of a novel chimeric gene mapping to mouse chromosome Yq

The male-specific region of the mouse Y chromosome long arm (MSYq) contains three known highly multi-copy X-Y homologous gene families, Ssty1/2, Sly and Asty. Deletions on MSYq lead to teratozoospermia and subfertility or infertility, with a sex ratio skew in the offspring of subfertile MSYqdel males.

http://www.biomedcentral.com/content/pdf/1471-2148-7-171.pdf