Dating groups yolk
Bringing darkness into the light By examining deeper parts of the cell more closely, the multi-disciplinary team has revealed that animal pole expansion at the cell surface, as previously proposed, is not essential for the yolk-cytoplasm segregation.
For example, in some species the amount of yolk in an egg cell affects the developmental processes that follow fertilization.
However, direct evidence supporting this model was lacking.
Joined forces: lab experiments and physical theory To understand the physical basis of this segregation process, Shayan Shamipour, Ph D student in the research group of developmental biologist Carl-Philipp Heisenberg, teamed up with the research group of theoretical physicist Edouard Hannezo.
The segregation of yolk from the surrounding cytoplasm in the very early fish embryo is a key process for the development of the fish larva.