Hypoblast Extraembryonic

Hypoblastic extraostasis is the formation of the lower parts of the yolk sac during its development in the egg and then in the blastula. Due to this, a separate protrusion occurs along the periphery of the embryo. With further development of the extraphosast, a yolk sac is formed.

Hypocystalnin is one of the subunits of the so-called histone regulatory protein - histone H1.