Furthermore, spermatogonia, but not advanced germ cells, have been shown to express Gas6, which serves as the ligand for the TAM receptors[252]. Gas6 is also a member of the vitamin K-dependent protein family and is related to Pros1, which is an anticoagulation factor that plays a role...
The first report on the presence of linker his- tone HILS1 in spermatids of mouse and human came a decade ago showing that HILS1 is a chromatin-bound protein and represents around 10% of all chromatin pro- teins present in the spermatids [41, 52]. HILS1 is pre- sent in the testis ...